This app is the official app of the HundredPushups.com It is basically a training program to help train you to be more fit. Instead of those TV programs that goes by various fancy names, this one costs much much less, and even logs your progress.
The app is pretty simple: it tells you what "program" you should be doing on a certain day. If you admit you did it, voila! You go on to the next program. Hopefully, in 6 weeks, you'll be much fitter with stronger biceps!
Push ups are pretty simple, so there's no fancy animations, or pretty graphics to inspire you. On the other hand, this doesn't cost a lot of money either.
If you are interested in fitness, this app is worth trying.