Plain Intervals: HIIT Timer

Any interval workout with spoken cues that keep going when the iPhone is locked, while your music plays. Free: no ads, no account, no workout limit, no subscription.

Plain Intervals times any interval workout: HIIT, Tabata, EMOM, circuits, boxing rounds, walk/run, stretching or your own. A voice calls every interval and the beeps keep coming when your iPhone is locked, while your music keeps playing. Free, with no ads, no account, no workout limit and no subscription.

START IN TWO TAPS • The big Start button runs the timer you used last. No onboarding, no sign-up, no permission request. • Seven templates to begin with: Tabata, HIIT 30/15, EMOM 10, Boxing 3/1, Walk/Run, Circuit, Stretch.

BUILD ANY TIMER • Blocks of intervals with rounds and rest between rounds; name every interval ("Squats", "Plank"). • Work, rest, prep and cool-down types, a colour per interval, halfway cue, countdown from 3, 5 or 10. • Open intervals that wait for your "Next" tap, with an optional reminder beep. • Save as many timers as you like; search, duplicate, share.

CUES YOU CAN HEAR • Spoken interval names and countdowns in the voice installed on your iPhone, plus three beep sets. • Sound and voice continue when the iPhone is locked (vibration only while the screen is on). • Music and podcasts keep playing: the cues mix in instead of stopping them. Cues play in silent mode unless you choose otherwise. • Optional Live Activity: the current interval, round and countdown on the Lock Screen.

THE RUNNING SCREEN • Full-screen colour of the current interval, big numbers you can read from across the room, landscape too. • Pause, Back, Skip, +30 s, End; a lock against stray taps; the screen stays on. • If iOS closes the app mid-workout, the next start offers to resume where you were.

HISTORY • Every workout saved with planned and actual time, skipped intervals and pauses; "ended early" when you stop. • Totals for the day, week and month, streak, most used timer; export as CSV.

YOUR DATA STAYS ON YOUR IPHONE Timers, history and settings are stored on this iPhone. Plain Intervals sends nothing anywhere and has no analytics. A backup file and timer links leave it only when you share them yourself. Like every app's data, they are part of your iPhone's iCloud or computer backup when that is on. 15 languages.