Keep is described as 'Get stronger, leaner, healthier with Keep with Fat burning and muscle gaining exercise -- HIIT and Cardio, Ab ripper workout, Legs Glutes toning, abs training, body weight and weight training exercises for toning, strength training, slimming, more muscle-focused workouts and' and is a Fitness Tracker in the sport & health category. There are more than 25 alternatives to Keep for a variety of platforms, including iPhone, Android, Web-based, iPad and Apple Watch apps. The best Keep alternative is LibreFit, which is both free and Open Source. Other great apps like Keep are Track90, wger, Strong and Hevy Workout Tracker.