BOOSTAVID app is an excellent Workout Tracker, Weight Lifting, Gym Planner,Gym Trainer and Fitness Tracker app that provides free fitness programs to help you stay fit and make progress out of your sessions. Also, there is calorie counting, nutrition, diet planning, and weight tracking. Other features include warm-up and stretching routines, progress reports, customizable workout reminders, and charts. Also, you can create your own workout routines. BOOSTAVID is one of the best Android fitness apps that is entirely free with no ads or any in-app purchases.