Sit-ups Challenge app for iPhone and iPad

Exercise is always more exciting when you are challenged or when you are working out with friends. With the built-in sensors and Apple Game Center, this app will help you add more fun to exercises with a tweak of challenge, achievement, and award points. With Sit-ups Challenge,
1. You can focus on sit-ups without counting or remembering the numbers or times. Just hit the start button, the app will automatically start when you are still and ready, automatically count your numbers or time your exercises, and then automatically stop when your targeted time or rep numbers is reached.
2. You can work your way up to a better health and fitness with increased number of repetitive or longer time of sit-ups.
3. You can quickly check your standing among your friends and all the users of this app with leaderboard.
4. You will be awarded with points when you are accumulating more sit-ups. Make your goal for 100 reps, 1 thousand reps, or even 1 million reps. Then watch your achievement being rewarded.
5. You can challenge your friends through the game center directly or post the result to your social media.