By maintaining a push-up position for several minutes with some variations you can find your way to perfectly flat abs and a strong core. Plank app will guide you through 10 increasing levels, that will train your body to gain strength. No other physical exercise is needed when you can have different types of planks, as plank makes every single muscle in your bodywork.
A free .apk file of Plank Workout 3.1.1 can be downloaded from Droid Informer and you can check out users' reviews on this site. Prepare 12 MB of free space on your device for this app setup package and keep in mind that it runs on Android 4.1 and higher. According to the antivirus report, the app is safe and secure. Fitfit.am is the creator of this application that refers to the Health & Fitness category.