I wrote an app that generates random heavybag workouts called "Shoutbox Workout Timer". I just re-wrote it and renamed it "FightTime Trainer". Basically, the app calls out commands for you to do while you shadowbox or use a heavy bag. It also has a ton of options to let you customize what it says and how often. It's free and available for Android in the play store. Link to play store: https://play.google.com/store/apps/details?id=com.krausnickstudios.fighttimetrainer&hl=en Link to YouTube Trailer: In the interest of full disclosure, the app contains ads... but just a little one at the bottom. Your feedback is requested. Thanks!