Daily Ab Workout is an application that guides you through ab workouts. Each workout contains ten different exercises.
There are three complete workouts, which you can finish in either 5 minutes or 10 minutes, depending on how strong you are feeling. If you don't want to follow a certain workout, you can start by doing single exercises. The application shows a video of a woman doing the exercises for a few seconds, and then a time counter starts working. You are supposed to do the exercise while the counter is active, and then switch to a new exercise when you are instructed to. The few seconds that the exercise is shown before starting are more than enough to see how an exercise is properly to be done. Some of the available exercises are: basic crunch, right oblique crunch, left oblique crunch, bicycle crunch, reverse crunch, long arm crunch, crossover crunch, half curl, vertical leg crunch and plank.
Currently, the application is selling for $0.99 at the Mac App Store, which is a steal. If you want to test the app before purchasing, go ahead and try the free one, which is identical to this one, but only comes with 1 workout.