Flexerval

Flexerval is a powerful and flexible interval timer that removes the predictability from your workout sessions through the use of audio cues (e.g. "jump", "jab", etc.). Simply type your own custom commands, and the app utilises your phone's native text-to-speech engine to read them aloud. Users are forced to react in real-time, perfectly mimicking the unpredictable nature of sports, sparring, and functional fitness.