Interval Timer: Tabata Workout is a free customizable sports interval timer app for Android that lets you create your custom training routine. It's designed for high-intensity training and workout, and is ideal for various activities such as crossfit, fitness, running, boxing, circuit training, breathing exercises, and yoga. This app is also useful as a productivity timer to focus on your work tasks.

The app's key features include setting up and editing your own workouts with customizable intervals and rest periods, tracking your progress with a calendar, saving your workouts in the presets section, differentiating each training phase with different colors and individually adjustable signals, and getting motivated by completing each exercise. You can also listen to motivational audiobooks or your favorite music while using the app, and the full-screen color-coded display is easy to read from a distance. The widget feature helps you train without being distracted by the constant unlocking of your phone.

Overall, Interval Timer: Tabata Workout is an easy-to-use workout timer that helps you achieve your fitness goals with ease and convenience.