The harsh realities of independent app development


FiftyThree's Bluetooth-enabled Pencil for iPad now ready for developers


iPhone and iPad app developers are the most likely to be making money


Apple launches Swift blog to keep developers up to date on the new language


Developers can now add Google Wallet Instant Buy to their apps


iOS apps can now "facilitate transmission of approved virtual currencies"

Apple pays tribute to awesome iOS app developers in latest video


Metal helps game developers get the most out of iOS hardware

WWDC 2012 Flashback: Mountain Lion, iOS 6 and the radical new Retina MacBook Pro


iOS 7.0.6 and 6.1.6 for iPhone and iPad released, go get your bug fixes! [Update: Apple TV too!]


Apple updates iTunes Connect, brings Sales and Trends into the modern age


New OS X Mavericks 10.9.2 beta, Safari 6.1.2 Seed 2 now available — developers, go get 'em!


Apple 2013 Tech Talk videos, presentations now available to developers


Apple tells developers apps must be 'optimized' for iOS 7 by February 1, 2014


Apple seeds new OS X 10.9.1 beta: Developers, come and get it!


Apple releases iOS 6.1.5 for iPod touch 4, also fixes FaceTime call bug


Apple gives game developers the ability to boot cheats from Game Center leaderboards


OS X Mavericks Server can create bots to help developers make better apps faster


Changes to code signing in OS X Mavericks and what developers need to know


Reveal goes 1.0, lets developers explode their apps, find bugs faster

Apple advises developers to stop accessing UDIDs, start supporting Retina and 16x9 by May 1

Apple advises developers that app submissions need to stop accessing UDIDs, star supporting Retina and 16x9 by May 1

Apple has posted two new entries to their developer news page, the first warning developers they need to stop tracking people via UDID, and the second warning them they have to start supporting the double density Retina display, and 16x9 iPhone 5 and iPod touch 5 dip-lays, by May 1.

Using Identifiers in Your Apps

Starting May 1, the App Store will no longer accept new apps or app updates that access UDIDs. Please update your apps and servers to associate users with the Vendor or Advertising identifiers introduced in iOS 6. You can find more details in the UIDevice Class Reference.

Make Your Apps Look Great on the Retina Display and iPhone 5

Starting May 1, new apps and app updates submitted to the App Store must be built for iOS devices with Retina display and iPhone apps must also support the 4-inch display on iPhone 5. Learn about preparing your apps by reviewing the iOS Human Interface Guidelines.

Since features like 16x9 support require iOS 6, that also means iOS devices that don't support iOS 6 likely won't be compatible with new and updated apps. That includes the original iPad and iPhone and iPhone 3G. While Apple has provided excellent support for older devices over the years, especially compared to some of their competition, that's certain to rankle customers still on those older devices.

But, the platform has to move forward.

Any developers want to weigh in on the matter?

Source: Apple developer news

Rene Ritchie

Editor-in-Chief of iMore, co-host of Iterate, Debug, Review, The TV Show, Vector, ZEN & TECH, and MacBreak Weekly podcasts. Cook, grappler, photon wrangler. Follow him on Twitter and Google+.

More Posts



← Previously

How to enable two-step verification for your Apple ID

Next up →

Jony Ive reportedly working on iOS 7 at Apple. Or, you know, doing his job...

There are 20 comments. Add yours.

JacobTheLegendary says:

You've got a typo in the first paragraph. "dip-lays" :)

dieselboy28 says:

As an iPhone 5 user this is great news. Forcing developers to update apps for the 4" display is a good move. But it definitely hurts people who are on old devices.

stephen007 says:

As far as I can determine, it'll only hurt those on an older device not running iOS 6.

EauRouge says:

I dont think the 4" display is here to stay. for the 5S, yes. but iphone 6, not IMO.

Dev from tipb says:

While some might gripe, Apple has largely done right with developers here. UDID access was deprecated as of the iOS 5 SDK, so developers have had plenty of advance warning this would be removed and restructure accordingly. The relatively short notice for requiring 16x9 support and retina assets is a teeny bit irksome, since to my knowledge Apple has not issued any official earlier warnings, but most devs should have been planning this way for a year, and, if they have not, well, those are the risks you take in a curated App Store.

SockRolid says:

As for mandatory Retina support, it's about damn time. The first Retina iPhone, the 4, was released in June 2010. And updating your app to handle both 3:2 and 16:9 screens isn't all that hard. (Unless your app has a whole bunch of custom frame-filling graphics.)

CrzyP says:

Is this an indication that app developers don't care about making quality apps for iOS anymore?

Solublepeter says:

I'm not sure I follow your logic there.

Are you saying that this rule shouldn't be needed, as all apps should already be 16:9?
Even if most are, this rule gives a nudge to the stragglers.

ZkiZZoiD says:

Good move for Apple by the way. Make the apps look and feel great.

CoachGoko says:

I don't think the last bit is true. You don't need to go iOS 6 only to support the 4" screen.
Depending on the app set up, could be as simple as adding one extra file called Default-568@2x.png

Team George says:

What does this mean for the 4s? It has retina but not an IPhone 5 screen size.

Ninotschka says:

Apps optimised for iPhone 5 screen seem to work fine on my iPhone 4 with iOS 5.

shinuyuki says:

They mean that Apps must be optimized for the iPhone 5 screen. While you can't see it on your iphone 4(neither can I, I use iphone4 too) if an app isn't optimized, it will have black bars (gaps) on top and bottom of the app.Apple doesn't like this

iSRS says:

I agree. I don't think the 16x9 is going to be an issue on older devices. The UDID? Could be as the new authentication method appears to be iOS6 (and greater) only.

davidbowser says:

I think some folks are misunderstanding the 16x9 comment. What Apple is telling developers is that their apps have to support that display option, not that it should FORCE to 16x9.

Jay Loftus says:

Apps supporting retina and the 16:9 ratio will still work on older devices, I recently released an app that runs on iOS 5.1 or greater that still uses 16:9 ratios on iPhone 5 with retina on iPhone 4/4S and supports old display on 3GS, just set the 'minimum required ios version' in your apps config file :)

SoggyTempura says:

All those people on old devices -- good riddance. Technology needs to keep moving ahead.

Peter000 says:

Does this indicate that there are 16x9 iPads coming?

iDonev says:

When I read "double density Retina display" I thought Rene meant the 400+ ppi displays.

tricksiphone says:

the article is interesting and filled with energy, to see more details at