BabyBump is a pregnancy tracking application for the iPhone, and excellent for both mothers- and dads-to-be or anyone interested in following someone's pregnancy.

The home screen of BabyBump displays your chosen avatar, name, how many weeks and days you are along in your pregnancy, what trimester you're in, and how many days left until your due date. BabyBump is divided into 8 different sections:

Weekly info - This is my favorite section. BabyBump gives the approximate length and weight of your baby and compares his/her size to a fruit or vegetable. It also provides information about your Baby's developmental stage, what to expect with your body, and a health tip.
Journal - Here is where can record your weight, waist size, moods, and appointments. You can view charts of your weight and waist changes.
Photos - A place to store photos.
Birth - This is an excellent section of BabyBump. There is a very tasteful and informative video of the birth process, a list of newborn essential items that you need for Baby's arrival, and a checklist of your birth plan. When your baby is born, come to this section to create a quick birth announcement and send directly to Twitter, Facebook, and email.
Kick counter - A nice timer to record kick sessions.
Contractions - A similar counter to record contractions.
Baby names - An organized list of 1000 boy and 1000 girl names. You can store a list of favorite names and add any names that aren't on the list.
Community - This is a forums board. There are many different forum categories including a section for dads!

I have been using BabyBump since December and have seen multiple updates and improvements in the past months. BabyBump is an excellent iPhone companion for pregnancy; in fact, it's a must-have app for anyone pregnant.

[$4.99 - iTunes link]

Pros

Weekly updates on your baby's development
Charts of your weight and waist size
Share via Facebook, Twitter, or email
Active forums
Excellents birth plan and newborn essential lists
Themes
Regular updates

Cons

Cannot record measurements in quarter units (i.e. 36.75 inches)
Information under "Body" and "Health Tip" are sometimes rather repetitive.

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Former app and photography editor at iMore, Leanna has since moved on to other endeavors. Mother, wife, mathamagician, even though she no longer writes for iMore you can still follow her on Twitter @llofte.