A free app for Android, by exercisetimer.org.
Plank Timer is a free application that allows you to keep track of the time you spend performing the plank exercise, as well as to create custom workouts. This app is a simple and easy-to-use tool that allows you to monitor and track your daily activities, so you will know exactly how much time you spend doing each workout.
The application also provides you with a way to challenge your friends, so you can keep track of how much time they spend doing the plank exercise.
The application is very simple, and you can do it without any training, as you can simply start the timer when you are ready to start working out.
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