This app helps you keeping track of your plank exercises for a period of 30 days.

Features- 30 day workout plan- Workout timer with exercises for plank, right arm plank and left arm plank- From 20 to 300 seconds in 30 days.- Post workout to Facebook- Additional workouts for download (Different levels, Squat challenge, 7 minute workout etc.)

Free to use, but ad-supported.