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 wger, which is both free and Open Source. Other great apps like Keep are Strong, SmartGym, Workout: Gym Workout Planner and JEFIT.