iOS and Android
Video Link: http://www.youtube.com/watch?v=V-UPuVF7rfU
This is coming up as "Abs Workout" in the iTunes store but is the same app based on a popular Youtube video (see above). Google Play kept the original name.
Overall Impressions from Around the Web:
Good reviews with many users paying to upgrade for extra features. Some iOS users having problems with a recent upgrade however.
Abs Workout (iOS)
8 Minutes Abs Workout (Android)