Watch the App Call Out Punch Numbers for Reaction Speed

The Shadow Boxing App is a boxing workout app that calls out combinations so you can train shadow boxing or on the bag without a partner. Punches have numbers: 1 is the jab, 2 the cross, 3 and 4 are the lead and rear hooks, 5 and 6 the lead and rear uppercuts. Once those six are in your head, the app can call “1-2-3” and you know exactly what to throw.

This clip is the standard callout workout. The app says a number or a short string of numbers, and you fire off the matching punches right away. There’s no screen to stare at, so you’re reacting to what you hear instead of reading ahead, which is what makes it good for building reaction speed. It’s also just fun: you don’t know what’s coming next, so you stay switched on the whole round instead of drifting through a combo you’ve done a hundred times.

You can try it for free. Download the app, learn the six numbers, and start a callout round. Once the numbering clicks it becomes second nature, and every workout after that turns into a reaction drill.