Pandora, Slacker, and Spotify are three of the most popular streaming apps available. But which one is the best option for iPhone users?

While iTunes is the undisputed king of digital music, it doesn't offer streaming or subscription services, leaving the field wide open for a wide variety of contenders, including Pandora, Slacker, and Spotify. That's important because not everyone wants to buy their music. Some iPhone users want more variety and a better way to discover new music, or simply re-discover old favorites. That's because music is personal. It has to suit both our general tastes and our mood at the moment. A good streaming music app needs to reflect this. It needs to have music available that we like, when we like, and the better it does that job, the better it is.

Pandora, Slacker, and Spotify each have their own unique take on streaming music, but which one does it best?

Pandora vs. Slacker. vs. Spotify: User interface and experience

When it comes to streaming music, users want to find what they want to listen to easily and start listening quickly. If you have to dig through tons of menus or spend lots of time figuring out how to find music, you're just as soon switch to something else. It needs to be accessible and even better -- customizable.

Pandora is extremely easy to navigate and use but doesn't have a ton of options. Pick from a station, like or dislike items, and create stations from a track or artist. Other than that, functionality is pretty limited.

Pandora's layout is relatively straight forward and simple. The first tab will aggregate all the stations you've listened to and a "quick mix" that will play a mix of your stations. You can tap the edit button and easily remove anything you don't want. The next tab allows you to add new stations. You can search by either artist or genre. Tapping on a station or artist will instantly start streaming that content. It will also add that station to your playlist tab.

The bookmarks tab does exactly what you'd expect -- it allows you to bookmark tracks and artists. This feature is handy if you want to keep lists of tracks for future purchase (you can jump straight into iTunes from Pandora to buy content). While Pandora doesn't allow you to go back and stream that exact track, you can create a station based on that artist or track. This is great for fine tuning the Pandora app to play content you like. Make sure when listening to tracks that you use the thumbs up and thumbs down feature to filter in content you're more likely to enjoy and filter out things you don't like.

The free version of Slacker shows ads along the bottom. Paid users won't see these. The main menu is where all your content will be located which makes the app extremely easy to navigate through. Overall, it flows together nicely.

Upon launching Slacker you get a home page that allows you to browse some pre-defined stations or create your own custom stations. Premium users will also have the option of creating custom playlists (that's a feature Pandora does not offer in their iPhone app).

After choosing a station or creating a custom station, you can like or dislike songs or artists just as you can with Pandora. When disliking a track, you can either dislike just a specific song or the artist in general. So if you detest Rihanna in all forms, just block her from ever showing up for you in Slacker again.

Slacker also gives you the ability to check out what artists and tracks are featured on a station. Tapping into a station allows you to view info on the station, check out the artists, and check out the song list. Tapping the play button next to the station name will instantly start streaming that station. Overall, the entire layout of Slacker flows nicely. There aren't tons of menus to navigate and all of your presets and content are accessible via the main page.

While Spotify is the most pleasing to the eye, the functionality is still rather limited. You can't search by genre or listen to pre-populated stations. You'll need to create playlists to get going.

Spotify for iPhone is quite a bit different when it comes to overall design and the manner in which you interact with your content. The main homepage shows you a slider of top tracks and new releases with news underneath. The first tab shows any playlists you've created as well as your inbox, starred, and local tracks (we will get more into these later). The next tab allows you to search for artists, tracks, and albums. Once you find what you're looking for you can either stream it, add it to a playlist, or star it to play it later.

Spotify also integrates Facebook to allow you to view what your friends are listening to under the Friends tab. You can, of course, disable this feature (if, like some of the iMore staff, you don't want your friends to know you secretly listen to the Spice Girls...)

I actually prefer Spotify's layout and interface to the others but there's one big downside -- you can't browse genres. If you don't know what you're looking for or find things in "what's new" or "what's hot", there's pretty much no other way to find music from the iPhone app. This doesn't make for a great experience.

Between the three, Pandora is somewhat plain and Spotify lacks the ability to find music productively. Slacker is a nice middle ground. It doesn't overwhelm you. It might look a bit busy at first but after using it, everything just flows nicely together.

When it comes to user interface and experience, Slacker takes the prize.

Pandora vs. Slacker. vs. Spotify: Content

Pandora, Slacker, and Spotify all focus on music, yet present content in very different ways. If you want a random selection and don't care for playlists, Pandora provides that. But if you want to customize your listening experience right from the start, Spotify and Slacker are the best bets.

Pandora for iPhone has tons of presets to choose from when it comes to radio stations. But if you want to be able to customize your listening experience, there aren't many controls to help you do so other than liking or disliking tracks and hoping it'll play more of what you like.

Pandora at its core is an online radio streaming service. You can choose the types of music you like as well as like and dislike individual songs or artists. If you come across and artist or song you really like, you can listen to a mix based on that song. What Pandora doesn't do is give you the option to add individual songs to playlists and make your own. It attempts to learn what you like by the ratings you give content. Sometimes those ratings aren't so accurate.

If you want a more radio-like experience and don't want to put too much work into finding and playing content, Pandora is great. Beyond that, it's lacking features even for premium users.

Slacker for iPhone comes equipped with radio stations just like Pandora. You can also like or dislike artists or tracks. Paid users can also favorite tracks to play instantly later or cache stations for offline playback as long as you've got storage room on your iPhone.

Slacker is simliar to Pandora from the standpoint that you browse through stations and like or dislike artists and songs. From there, Slacker will show you custom content based on your own tastes. You can like and favorite songs which will show up under your favorites section off of the main menu. If you are a premium subscriber, you'll be able to listen to songs on demand.

Slacker allows offline streaming of up to 25 stations at a time (as long as you have room on your iPhone to store the content). You'll need to be a plus or premium member, but you'll be able to listen to your favorite stations without using up your data plan. To access stations you've saved for offline playing, just select the cached content section on the main menu and you're good to go.

Spotify for iPhone doesn't have presets built-in. You'll need to add playlists and customize your experience. You can actually only access Spotify from your iPhone if you're a premium subscriber. This may be a road block for users who don't necessarily wants to pay to stream.

Spotify concentrates on a more tailored experience. When it comes to the iPhone app, you can either search for content to play one song or album at a time, or build playlists. There are no stations to weed through or genres to choose from. This may be a deal-breaker for users who want the ability to browse music instead of having to find something specific. There are many times I just want to start playing music and don't really know exactly what I want to listen to. I just know what type of music I want to listen to.

If you'll only be using your iPhone to stream, Slacker will provide you with the best content selection and ways to sort and listen offline. While they don't have custom playlists, you can favorite songs you hear that you like and listen to and access them under your favorites tab on the main menu.

When it comes to content, Slacker wins.

Pandora vs. Slacker. vs. Spotify: Cross-platform syncing & streaming

If you plan on listening not only on your iPhone but on your computer or other mobile device, such as an iPad, you may want to consider what each service offers on other platforms, especially if you're contemplating a premium membership.

Pandora One gives you access to Pandora's desktop application for Mac and Windows. While it's better than web-based streaming, it's very minimal and nothing to get too excited about.

Pandora has a wide array of mobile apps available for iPhone, BlackBerry, and Android. You can also listen online. When you sign into your account all your information and saved content will be there.

Pandora One is Pandora's premium subscription model. It gives you access to the desktop application for Mac or Windows. The desktop app really isn't anything to get excited about and s quite dull. There's not much to interact with and it doesn't offer you any particular benefits over using the web-based player.

Slacker doesn't have a native Mac or Windows application but you can stream directly from the website. Paid users will not see any ads after logging in.

Slacker also has applications for most platforms and a few more than Pandora offers, namely a native iPad client. They also offer support for Windows Phone 7, Nokia, Palm, BlackBerry, Android, and many more. Slacker will save all your content under your login and it will be there regardless what app or platform you sign in to.

Slacker does not have a Mac or Windows app but you can, of course, stream straight from their website.

Spotify for Mac is by far the best way to enjoy streaming to your computer. If you spend a lot of time on your computer and need a good client, Spotify is what you want.

Spotify also supports popular platforms such as Windows Phone, Android, BlackBerry, and iPad.

While I have an issue with Spotify's lack of a search feature on the iPhone, it makes up for that with the Mac and Windows app. It's by far the best desktop app of the three (especially considering Slacker doesn't even have one). You can view popular playlists, star tracks, see what's popular in your area, and monitor what your friends are listening to.

My favorite feature of Spotify's desktop app is the ability to wirelessly sync your starred tracks and playlists whenever your iPhone is on the same Wi-Fi network as your desktop computer. I frequently use this feature when I'm listening to music in the office or at home. I'll star music that I particularly like and have my iPhone set up to download starred tracks for offline use. I launch Spotify while on my network, the desktop app recognizes it instantly, downloads any changes, and I get in my car and start listening without having to worry about using my data (offline mode requires premium subscription).

You can also use the Spotify desktop client to sync local tracks from your computer. It'll pull everything in from your music library. While I don't typically use this service, it will be a nice addition for users who don't have to have to manage music in two separate apps. Spotify can handle it all.

When it comes to cross-platform support, Spotify takes the win due to their robust Mac and Windows app. When they launch their anticipated iPad app, it'll just be that much better. The iPad app is available now.

Pandora vs. Slacker. vs. Spotify: Audio quality

One of the most important aspects of listening to music for many is how good it sounds. There's no exception when it comes to streaming content. It's really hard to give a consistent rating considering many things can influence the actual rate at which music stream, such as your internet connection and whether or not a specific track is even available in a higher quality format.

Pandora streams at at average rate of around 64kbps for free listeners on the web, and at 192kbps for premium subscribers. They make no guarantee about mobile listeners, such as iPhone users, considering so many external factors can affect the bit rate.

Slacker doesn't have much information on the exact rate at which they are streaming but they do say that regardless of what platform you are streaming on, you should experience "near-cd quality" audio.

Spotify is a bit better at explaining what they stream. Premium users can get up to 320kbps on the desktop app and within the iPhone app. Of course, actual quality may vary given internet connection and other variables. They say the typical average and free users usually get around 160kbps.

Spotify wins when it comes to audio quality.

Pandora vs. Slacker. vs. Spotify: Pricing & features

While content is super important, so is the price you have to pay for it. While Pandora, Slacker, and Spotify all have a free ad-supported version, they also all offer premium subscriptions.

Pandora's premium service, Pandora One, weighs in at $36 a year or $3.99 per month. So if you can buy yearly, you'll get a bit of a discount. Pandora One will get you the following additions over the free version:

• Higher quality streaming - 192K bits per second
• Removal of ads
• Unlimited skips per day (but you'll still be limited to 6 skips per hour due to licensing issues)
• Access to the desktop player
• Extended timeout (listen up to 5 hours while not by your computer or iPhone)
• Custom skins

Slacker has 2 subcription models to choose from. The $3.99/month plus subscription will get you the following over the free version:

• No ads
• Unlimited song skips
• Mobile station caching (offline playing)
• ABC news
• ESPN radio

The $9.99/month premium subscription will get you everything listed above as well as the following:

• Songs on demand
• Albums on demand
• Single artist stations
• Caching of albums and playlists
• Create custom playlists

Spotify also has two subscription models outside of their freemium model but we're only going to cover the $9.99/month version because, sadly, that's the only version that will even allow you to stream to your iPhone. There is a 48 hour free trial if you'd like to check it out first. Just download the app to activate your trial.

• Manage your local MP3s
• Take your music abroad
• Artist radio
• No ads
• Play local files on your mobile device
• Offline mode on your desktop & mobile
• Enhanced sound quality & content

Pandora, Slacker, and Spotify all provide access to play content through your home or office systems such as Sonos. They're all widely accepted and you shouldn't run into issues with any of them when it comes to a lot of the popular music systems.

When it comes to price, Slacker offers the most for only $4/month but Spotify offers much more in their $9.99/month package. You'll just have to weigh out what you need and what services you'll really use. Go with the one that has a better value for you personally.

When it comes to cost, it's a tie between Slacker and Spotify.

Pandora vs. Slacker. vs. Spotify: Conclusion

Pandora, Slacker, and Spotify all offer streaming experiences in very different ways. I can't help but feel that Pandora is lacking when it comes to functionality and customization. I know many users just want to listen and go, but access to previously listened to songs and stations would be a welcome addition.

Slacker provides a nice streaming service for free with an easy to maneuver through interface. You can even get offline caching for only $4/month. That's a very sought after feature for many users who want to be more conservative with their carrier data. You won't get it cheaper than you do with Slacker.

Spotify is the new kid on the block but packs a punch. While I think they have the best desktop experience of all three, we're talking iPhone app here. And sadly, that's lacking. There is no way to browse for and discover music. That's a deal-breaker for me. So is having to pay $9.99/month just to use the iPhone app. If Spotify could fix these two issues by beefing up the iPhone app and giving iPhone users access either for free (ad-based) or at a cheaper rate, they'd be the best choice, hands down.

Only one of these apps seems to be a happy medium between discovering and customizing the streaming experience, and that's Slacker. It'll suit most users needs and offers the flexibility most users need.

Slacker is the best streaming app for iPhone.

Pandora - Free - Download Now

Slacker - Free - Download Now

Spotify - Free - Download Now

My iPhone is the perfect cycling companion. It entertains, informs and keeps track of where I go and how long it takes me to get there.

February is Health and Fitness Month at Mobile Nations, and my exercise program for most of my adult life has been cycling. Living on Cape Cod, I am treated to some beautiful vistas, ocean views and a fair share of challenging hills. During the warmer months, I can be at the ocean in about seven minutes and then continue for 20 – 30 miles along the coast.

My rides would be far less enjoyable without my iPhone as my entertainment/navigation system and ride recorder. I use the heck out of my iPhone for pretty much every ride. Seeing as though we have pretty much avoided “winter” this year, I can continue my outdoor rides - even on a February afternoon!

Monitoring your general health

Fitter keeps track of any significant changes to BMI or body fat percentage or other measurements.

I have been pretty fortunate for most of my life in that I have stayed at virtually the same weight for the last 15 years (as long as I stay active.) I do have some fluctuations and occasionally use apps like the Fitter Fitness Calculator to keep track of things.

Fitter - $0.99 - Download now

Getting the right music

Having a great playlist on your iPhone can help keeping going, so can the right station on Pandora or Spotify

While riding with earphones is not always the smartest thing to do on a bike, most of the roads I travel are pretty empty; so I usually “plug in” when I ride. Often I will just put in one earbud and let the other hang so I can still hear the traffic.

I need to have the right tunes – especially on a longer ride – so I have a few options. I have a standard “Bike Riding” playlist that I made in iTunes, which usually does fairly well for me. There is nothing worse, though, than landing at the base of a hill and having a slow ballad come on. I try to keep all the music at a good beat to keep me motivated.

I also use Pandora stations and Spotify playlists on occasion. Everyone’s musical tastes are different, but for me, the Led Zeppelin station on Pandora usually suffices.

Free - Pandora - Download now

Free - Spotify - Download now

Keeping Track of the Ride

With the Strava app, I can keep track of all my rides and review them at any time.

I like to monitor my progress through the riding season. I set goals for distance, speed and calories burned. Fortunately, there are two great apps that I use to help me with this.

Strava Cycling is a great app and provides lots of useful data. It keeps track of where I am and where I go, how fast I’m going and what my average speed is. At the end of the ride, the path and stats of the ride are uploaded to their server, for easy reference later.

If you are looking for a “new” ride and are feeling competitive, you can try to beat the stats of another Strava user.

Another great feature is the Explore button that shows you other rides uploaded in your area by Strava users.

Road Bike Cycling Computer keeps track of all your data, and can even factor in weather and road conditions.

The other app I use is Road Bike Cycling Computer. It keeps track of each “Session” you ride and adds calories burned and rpm’s to the data. You can touch the History button to see your rides. One nice feature with the Road Bike Cycling Computer app is that you can input data for weather conditions and the type of surface upon which you were riding to help monitor your progress.

Get cycling!

My iPhone is the perfect cycling companion. It entertains, informs and keeps track of where I go and how long it takes me to get there. While there are certainly days where I leave the phone at home and ride with friends – most days you can see me pedaling along the shore, plugged in and monitoring my ride with one of the apps listed above.

Remember to jump into our Health and Fitness Forum and let us know your goals and how you are doing. You can even enter to win an iPod nano, and IOU for an iPad 3, or an XBox 360 Kinect!

These are Seth's most used apps of 2011. Others have their own most used apps, but these are Seth's.

Tweetbot

I've come to rely on Twitter for far more than the occasional distraction from my day, and Tweetbot has been the only app to deliver all the features I want in a package I like to look at. With support for TweetMarker syncing between clients, it's become my go-to place for news, conversation, and everything else Twitter has to offer.

• $2.99 - App Store link

Kindle

With a bigger selection than iBooks and a library I can share easily with my wife, the Kindle app is my reader of choice. Kindle delivers apps on almost every other platform you can think of, perfect syncing of reading position, and a simple, clean reading environment of which I never seem to tire.

• Free - App Store link

1Password

Couldn't run the office without it. I store everything in this app: passwords, software licenses, notes, screenshots of web pages - and so on. Absolutely the most indispensable app on my Mac, and always with me on my iPhone.

• $8.99 - App Store Link

Instacast

The winner in the great podcast client war of '11. I've tried almost everything available, and Instacast, though not perfect, is the best client for my needs, which consist of downloading podcasts quickly and playing them with minimal physical interaction required on my part. The addition of iCloud syncing and the appearance of Instacast HD late in the year definitely helped cement its place on my phone.

• $1.99 - iPhone App Store link
• $4. 99 - iPad App Store link

Pandora

This seemingly ancient app (in App Store years) is still one of my favorites. There are a million different music services on iOS, and there's something for everyone. But more often than not, all I want to do is hit play and let the app do the work, and Pandora still works better than most other things for me. Again, my wife and I share an account, so we are always discovering new stuff based on what the other person's given a thumbs-up to, and the removal of the 40-hour free account listening limit is the icing on the cake.

• Free - App Store link

• Our podcast feed: Audio | Video
• Download directly: Audio | Video
• Subscribe in iTunes: Audio | Video
• Subscribe in Zune

Phil, Adam, Derek, Jay, and Rene talk Amazon Kindle Fire pros and cons, Porsche's BlackBerry and phones as fashion, webOS indecisions, and Google Music vs. iTunes Match vs. Amazon Cloud vs. Zune Pass and more! This is Mobile Nations!

Agenda

• Amazon Kindle Fire
• Google Music
• Porsche Design P'9981 Smartphone from BlackBerry Video Unboxing!
• HP still not sure what to do with webOS, will take three-to-four weeks to decide
• iTunes Match

Hosts

Feedback

Got something to say? Agree or disagree with something we said? Have something you want us to discuss on a future show? Don't just sit there yelling at the screen, dammit, let us know!

• Email: podcast@mobilenations.com
• Twitter: @mobilenations
• Web: www.mobilenations.com

Credits

Our music is pROgraM vs. Us3R by by morgantj. Introduction by Joseph Holder.

Thanks to the Mobile Nations network of store for sponsoring this podcast, and to our fantastic live chat members for keeping us honest and making us smart!

Every day, TiPb gets flooded with announcements for new and updated iPhone, iPod touch, and iPad apps and games. So every day we pick just a few of the most interesting, the most notable, and simply the most awesome to share with you!

• Cartoonatic: Record Amazing Videos with awesome cartoon effects! [Free - iTunes link]

• Pandora: Now works with Model Year 2011 BMW vehicles equipped with the “BMW Apps” option and March 2011 production MINI Connected infotainment systems. [Free - iTunes link]

• Bird Zapper!: It's a Spring Fling! Those crazy birds are laying special Easter eggs and giving battery gifts for a limited time only! [$0.99 - iTunes link]

• Due: Update to 1.5 includes advanced recurrence, the ability to fine-tune your notifications, four new alert sounds, and speed improvements. [$4.99 - iTunes link]

• iSharing Lite: Real-time GPS tracking App. Locating friends with nearby alerts. [Free - iTunes link]

Any other big apps or game releases or updates today? If you pick any of these up, let us know what you think!

We're shifting our focus from iOS 4 compatibility updates to any iPhone or iPad app or game, new or updated, that seems especially awesome.   So if you guys see anything you think deserves some special attention, let us know in the comments and we'll look at including it in a future roundup!  Continue on to see what we found this time!

Pandora

Pandora recently updated their current app to support hi-res images on the iPhone 4. It also fixes several issues with the last version of Pandora. This will also change control settings for volume control and fix crash issues. Since downloading this update, Pandora's been a lot more stable for me. How's it been for you guys?

[iTunes Link]

Box.net

Box.net is a great service for sharing files and viewing them on the go. They offer free accounts as well as paid accounts. There's a lot of options for file storage and sharing out there, and Box.net is definitely a worthy competitor. This update adds fast app switching as well as some tweaks to the general UI. It also adds speed improvements for viewing files by adding caching. If you have it, grab the update, if you don't, try it out and let us know what you think!

[iTunes Link]

Cannon Cadets

Cannon Cadets is a new game coming to us by the same people responsible for Little Metal Ball. (If you don't have Little Metal Ball, check that one out too!) Most of their games are physics based games that require maneuvering and use of the accelerometer. This game combines a story into puzzles and 80 graphically awesome levels. Definitely worth a try. You can also choose an in-app purchase that'll allow you to unlock all the levels if you want to skip around instead of playing in order. If you pick it up, let us know what you think!

[iTunes Link]

Photoshop Express

Photoshop has long been a favorite of many graphic junkies, and while the iPhone and iPad (yes, I said iPad) versions of Photoshop won't do you any good for hardcore editing, for on the go picture editing and adding fun little tweaks to your pictures, Photoshop Express is great. This version adds compatibility for iPad too! This version also allows native uploading to Photoshop.com and Facebook. The general UI seems to be revamped a bit as well as some of the workflow spaces.

[iTunes Link]

Dragon Medical

This app is mainly focused on professionals in the medical industry. You can use voice controls in order to look up drug interactions, diagnosis information, and much more. It aggregates from some of the more popular databases on the internet. So if you're a medical professional or student in the medical field, it may be an app worth a second look.

[iTunes Link]

How does an elementary school teacher use her iPad to get the job done and what iPad apps help get her through her day? TiPb’s iPad at work contest aims to bring you just such slices of the iPad life. Here’s Courtfrogger's answer and as a small token of thanks we’re sending her a $20 iTunes gift certificate. If you want to see your name up on the TiPb home page and get a gift certificate all your own, head on over to the TiPb iPad Forum and share your story now!

The iPad has added another dimension to my classroom! I teach music, English and theatre at a very small public k-12 school. I use the iPad for lots of different things in the classroom, at meetings and at play rehearsals. For my youngest students, who sometimes just need to dance, I use Pandora. I can just type in "Tito Puente", for example, and get unlimited Latin jazz that keeps them moving and very happy.

For slightly older kids, who are learning band instruments for the first time, I can use the YouTube app to show them videos of famous musicians playing their instruments. With the cleaner interface, I don't have to worry about R- rated adds showing up alongside the content I want.

For the spring production of "A Doll's House," I loaded the script into iBooks. I found it free through project Gutenberg. I can easily toggle back and forth between that and my notes, keeping track of actors' lines while taking direction notes. I don't have to worry about running out of paper, dropping my script, or forgetting a pencil!

For fun, I showed my kindergarten class the Planets app. They're studying planets right now, and for music class they wrote rhymes about planets that can be sung to the tune of twinkle twinkle little star. Being able to spin beautiful images of the planets was engaging for them and added a tangible element to the class.

So there you have it! My top five apps for the music and theatre classroom are Pandora, YouTube, iBooks, notes and Planets.

Are you an elementary school teacher? If so, what apps do you use to enhance the learning experience in the classroom?

Just get a new iPhone or iPod touch and curious which are the best, most must-have apps and games you need to install first? Want to really show off that Retina Display or take advantage of multitasking? Well read on for TiPb's top 10 most recommended, most must-have iPhone apps to get your started.

Note: This article has been updated for iPhone 4S -- check out the new top 10 apps for iPhone post to see the latest picks!

Just switch to iPhone or Verizon iPhone? Also check out:

• Top 5 iPhone apps for BlackBerry switchers
• Top 5 iPhone apps for Droid/Android switchers

Social apps: Facebook for iPhone

Facebook is one of the most popular sites on the web, so any wonder it's once of the most popular apps on iPhone? Sometimes we suspect people live almost entirely in the Facebook app -- at least until the phone rings! Sure, you can go to Facebook's mobile site in Safari but the app offers so much more functionality, from picture uploads to easy Facebook Places and Groups access, it's earned its place on our home screens. [Free - iTunes link]

Also check out:

• LinkedIn for iPhone, for business users. [Free - iTunes link]
• Twitter for iPhone, for frequent tweeters. [Free - iTunes link]

Casual games: Angry Birds

Angry Birds is the undisputed king of casual gaming and an addictive puzzler in the best tradition of the genre. Evil green pigs have stolen your eggs and your birds aim to get them back -- with slingshots, explosives, boomerangs, and other manner of weaponized avian fury. Kill all the pigs to clear a level, do it with style and earn the elusive 3-stars. It starts off easy but ramps up quickly as the minutes turn to hours. You've been warned! [$0.99 - iTunes link]

Also check out:

• Cut the Rope for some physics puzzle fun. [$0.99 - iTunes link]
• Plants vs. Zombies for relentless action. [$2.99 - iTunes link]

Communication/IM apps: Skype for iPhone

Skype for iPhone lets you make Skype-to-Skype calls for free, and if you have Skype credits, Skype-to-phone calls very cheaply. Thanks to the latest version of iOS, it can also run in the background so it can answer Skype calls just like a real phone (though it will decrease battery life). They're slow to update but they're the standard for VoIP (voice over iP) and a great way to cut down on phone bills. [Free/credits - iTunes link]

• BeeJiveIM, if you just want chat, supports AIM/MobileMe, MSN/Windows Live, Yahoo!, GoogleTalk, Facebook, MySpace and Jabber [$9.99 - iTunes link]
• Google Voice for iPhone lets you access your calls, texts, and voice mail. [Free - iTunes link]

Time management games: Smurf's Village

Sure, the ultimate goal of building the best village is just the same as other games, but Smurfs’ Village also has a story line. After each level increase, there's dialogue and a quest, and also mini games you can play to earn more experience. The graphics are great and the gameplay is smooth. Smurfs’ Village is free but some items require smurfberries which are available as an in-app purchase. Smurfberries can also be used to speed up the growth of plants and construction of buildings. Universal app - download once, use on iPhone, iPod touch, and iPad. [Free - iTunes link]

Also check out:

• Farmville to bring your Facebook farm to iPhone. [Free - iTunes link]
• We Rule to build the perfect palace. [Free - iTunes link]

Productivity apps: Documents to Go Premium

While the iPhone's screen is a bit small to handle all your business or school work, the ability to edit Office files on the go can be a lifesaver. Documents to Go Premium lets you create, read, and edit Word, Excel, and PowerPoint files well enough to get the job done and will even open Mail attachments and sync files via iTunes or with Google Docs, Dropbox, Box.net, iDisk & SugarSync for the ultimate in mobile accomplishment. Universal app - buy once, use on iPhone, iPod touch, and iPad. [$16.99 - iTunes link]

• Good Reader is a powerhouse for PDF annotating and file management. [$2.99 - iTunes link]
• Evernote stores text, images, and audio for easy reference later. [Free - iTunes link]

Hardcore games: Infinity Blade

Epic's Unreal 3 engine explodes onto iPhone with Infinity Blade, an on-rails sword fighting extravaganza with some of the best visuals we've ever seen. The story and gameplay are simple if not simplistic, you battle a series of monsters and their God-King over generations, growing your power, magic, and skill until you're strong enough to win. It might sound repetitive but it quickly becomes as addictive as it is gorgeous. Universal app - buy once, use on iPhone, iPod touch, and iPad. [$5.99 - iTunes link]

Also check out:

• Modern Combat 2: Black Pegasus for some CoD-style fun. [$6.99 - iTunes link]
• Real Racing 2 for amazing cars and online play. [$9.99 - iTunes link]

Music apps: Slacker Personal Radio

Thanks to the latest version of iOS, Slacker (and Pandora) can now run in the background which means you can stream all the music you like while surfing the web, using turn-by-turn navigation, answering email, or pretty much anything you want. Slacker requires a subscription and is currently only available in the US and Canada. [Free - iTunes link]

• Spotify for streaming music in Europe. [Free - iTunes link]
• Shazam to figure out what you're listening to. [Free - iTunes link]

Photography apps: Photo FX

The iPhone is the best camera because it's the one you most often have with you, but sometimes the photos you take with it will be rushed, a little dark, a little light, or otherwise a step or two away from perfect. Photo FX and their hundreds of filters and special effects can help fix that. It can't work miracles but it can make the difference between a shot you save and one you throw away. [$2.99 - iTunes link]

Also check out:

• Hipstamatic brings old-school feel to new world pictures. [$0.99 - iTunes link]
• Flickr for iPhone lets you store and share all the shots you take. [Free - iTunes link]

Utility apps: Find my iPhone

Previously you had to pay for MobileMe to get Find my iPhone but now it's free to everyone. Just download the app, set it up with your iTunes ID, and if you lose your iPhone (or it gets stolen) you can GPS locate it, make it beep or display a text message, remote lock it, and even remote wipe it so no one can get access to your personal data. Whether it's under some papers on your desk, back at the restaurant you just left, or in some bad guy's hands, Find my iPhone does just what the name says. Universal app - download once, use on iPhone, iPod touch, and iPad. [Free - iTunes link]

• Skyfire is a web browser that lets you watch some Flash videos on your iPhone. [$2.99 - iTunes link]
• RedLaser scans barcodes and finds you the best price online. [Free - iTunes link]

Location/GPS apps: NAVIGON MobileNavigator

Get full fledged turn-by-turn driving directions on your iPhone so you can keep your eyes where they belong -- on the road. NAVIGON provides on-board maps which means it's a huge download but it keeps working in areas where there's no data coverage. You can buy regional, country, or continents at a time, and there are also options for live traffic updates, parking directions, and enhanced panoramic views of the surroundings. [Various - iTunes link]

Also check out:

• Gowalla lets you "check in" to locations, keep track of your and your friends' locations, and earn badges for being there. [Free - iTunes link]
• Yelp provides restaurant, gas station, bar, and pretty much any type of business location and recommendations. [Free - iTunes link]
  

Your top apps?

So there you have them, our top 10 best iPhone 4 apps to get you started. Be sure to check out our Picks of the Week and iPhone App and Games Forum for more recommendations, and if we missed any of your favorites leave them in the comments below!

We let you know a couple days ago there were a few apps that had already been updated via the App Store to support iOS4. Since then we’ve seen a few more roll out.  Some developers have really taken advantage of the new APIs in iOS4.  Others seem to just be adding compatibility at this point.  Let’s hope a lot of them are working on substantial updates.  Hit the jump for some more iOS4 compatible apps!

Evernote

Evernote (version 3.3.5) is one of the first I’ve seen to implement quite a few 4.0 APIs.  Not only does it come complete with fast app switching integration, but your notes will also be able to sync in the background.  This will be extremely useful for users who like to upload pictures.  I’m always doing this when I’m comparing prices.  I’ll take pictures of SKUs from different stores and tag them accordingly which allows me to flip through later and compare which ones are cheaper and which ones have rebates attached, etc.  Much easier than writing a note with all that information.  The down side to that has always been pictures take a bit to sync with the Evernote servers at times and keeping the app open the entire time was somewhat of a pain. Thanks Evernote! (Read more about Evernote and iOS4 here.) [iTunes link]

LinkedIn

For now, it looks like LinkedIn has added support for fast app switching, but I don’t see much more than that at this point.  I’d love to see the LinkedIn app get a lot more intuitive than it is.  Hopefully they’ll be adding more support in future updates.  If you caught anything I didn’t on this one, let us know in the comments! [iTunes link]

Windows Messenger

Not only is this one new to the App Store, it came out of the gate with iOS4 integration built-in.  It also supports alerts for Hotmail as well, so you’ll get notifications in-app when you receive new e-mails via your Hotmail account.  And again, if you see anything worth noting, let us know! [iTunes link]

Pandora

I know a lot of you have been waiting for this one. This update just hit the app store a few short hours ago. Pandora background streaming was demonstrated at WWDC 2010 and lots of users were excited to be able to allow Pandora to finally run in the background. This feature has been available for other mobile platforms for quite a while. [iTunes link]

Loopt

Loopt is another company that's taken advantage of additional APIs available behind iOS4. Fast app switching, PNS alerts, and grid based navigation are a few of the features the new version of Loopt offers. [iTunes link]

WordPress

One of the most popular blogging engines on the planet comes out on release iOS release day claiming Retina Display support? Even if they're just scaling text and UI elements, good on them. [iTunes link]

Know of any other iOS 4 compatible, feature-empowered apps that we may have missed? Drop them in comments and we'll include them in the next round up.

If you are a Pandora user and are currently running iOS 4 on your iPhone or iPod touch then head into the App Store to update the app to version 3.1 which contains the new multitasking feature. Today, at some point, Apple will be releasing iOS 4 to the masses so it is no surprise we will start to see many applications in the App Store updated to be compatible with iOS 4.

So waste no time and take advantage of the latest version of Pandora!

[Thanks to all of you who sent this in!]

A lot of folks (yours-truly included) have been loving Pandora lately because they've been using the excellent native iPhone app (Read a Lightning Review of Pandora). With any luck, these folks could be mobilized to help Pandora out -- they're facing crippling and unfair royalty fees from SoundExchange. It's an issue that we reported on a bit last year over at our sister site, WMExperts. The gist is this: the RIAA and SoundExchange are looking to enforce new royalty rates for Internet Radio that are so high that it's fair to say they're meant not to pay artists, but to destroy a medium. This article on Pandora's plight over at the Washington Post [via] is a pretty good summary of the state of the Internet Radio fight, and here's a pretty good summary of the article:

"We're approaching a pull-the-plug kind of decision," said Tim Westergren, who founded Pandora. "This is like a last stand for webcasting." [...] Westergren, seemingly wearied by the constant haggling over the issue, signaled that Pandora's investors may also be impatient for an end. "We're funded by venture capital," he said. "They're not going to chase a company whose business model has been broken. So if it doesn't feel like its headed towards a solution, we're done."

Our take: the actions taken last year by SaveNetRadio.org and the huge masses they were able to mobilize managed to shine enough light on this issue to delay what looked like the impending death of Internet Radio. Now we're back for Internet Radio 2: The Revenge, and since Pandora's now on our iPhones, this time, it's personal.

Or better: We might be approaching Pandora's Last Stand, but let's make sure they don't stand alone.