Boxing Timer (Stopwatch) is a free Android app developed by Martin Machata that is perfect for both training and matches in boxing and MMA. The app features a simple interface and design that is easy to use for any level of athlete.

The app allows you to set up your own custom workout with prepare time, round time, rest time, and number of rounds. You can even change the number of rounds and length of each round during your workout. Additionally, you can customize the app's sounds to start and end each round, countdown, half of round, and XX seconds before the end of each round.

Overall, Boxing Timer (Stopwatch) is a very useful app for anyone who wants to train or compete in boxing or MMA. Its simplicity and customizability make it a great tool to have in your workout routine. Simply install the app, set up your workout, and start training or fighting!