In the past few years, we have covered plenty of apps that can help you become a better boxer. Quiet Punch can also help. It is a doorway boxing trainer that can be installed effortlessly in 28″ to 36″ doorways. It comes with 2 lightweight bars and a phone clip. The accompanying app has instructional videos for you to try.
The phone clip lets you attach your phone and watch videos as you exercise. You can pre-order Quiet Punch for $119 for a limited time.[Source]