Intertakt

An interval timer for HIIT, Tabata and round-based training, built to run without the screen. Voice counts you in and out of every interval, beeps mark the transitions, and both play over whatever is already playing — music, podcast, audiobook — with independent volumes for each channel. The phone goes face-down or into a pocket for the entire session: nothing about the workout requires looking at it. Sessions survive incoming calls and app switches, and resume from the exact second they stopped. The free tier gives unlimited workouts with no ads and no accounts