Intertakt

Every spin class runs on the same arrangement: music playing, and a voice on top telling the room what happens next. The count arrives on top of the song, never instead of it. Intertakt brings that arrangement to HIIT, Tabata and rounds. A clear voice announces each interval and the halfway mark; countdown beeps sit over your own playlist, and music, voice and cues each keep their own volume, so the track keeps rolling while the timer keeps time.

Start the session, put the phone face-down, and it stays there: the session runs with the screen off, on Do Not Disturb, in a pocket or on the bench. An incoming call or an app switch interrupts nothing — the workout resumes from the exact second it stopped.

It is built for people who train with headphones on and without a free hand, and it deliberately does not do the usual three: no ads, no session limits, no accounts. 0 ads, ∞ sessions, 0 accounts, and the free tier means it. Premium adds unlimited custom plans, history and JSON export as a one-time purchase, not a subscription. Built with Flutter, offline-first. Coming soon to Google Play; the waitlist and founding pricing are open at intertakt.com.