Plank Challenge App
This app helps you keeping track of your plank exercises for a period of 30 days.
- 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, Ab Challenge, 7 minute workout, etc.)
Free to use, but ad-supported.