Interval Timer: HIIT & Tabata

Interval Timer is a HIIT, Tabata and boxing round timer that KEEPS RUNNING when the screen goes off: a foreground service with a wakelock and drift-free elapsed-time math means your workout never silently dies in your pocket. No ads before your workout, no account, no signal needed — and Pro is a one-time purchase, not a subscription for "one timer".

FREE

✓ Quick timer — set work / rest / rounds with steppers, see the total, hit start
✓ Custom sequences — named intervals with their own duration and color; add, edit, duplicate, reorder; save up to 5 workouts free
✓ Ready-made presets: Tabata (20/10 × 8), EMOM 10, AMRAP 20, Boxing (3 min / 1 min × 12)
✓ Fullscreen timer — huge auto-sizing digits, background color switches with the phase (work = red, rest = green, or your own colors), circular progress ring, round counter, next-interval preview
✓ Voice coach — text-to-speech announces each exercise by name; 3-2-1 countdown beeps and interval-change tones
✓ Music ducking — beeps briefly lower your music instead of pausing it; Spotify keeps playing
✓ Survives screen-off and Doze — foreground service + wakelock; time computed from elapsed-time deltas, so it can't drift even if the system delays a tick
✓ Notification controls — pause / resume / stop right from the status bar
✓ Get-ready countdown before the first interval, so you're in position when the clock starts
✓ Whole-workout progress bar, step counter and an end-of-session summary
✓ Configurable cues — 3, 5 or 10 countdown beeps, and an optional prompt every 15/30/60 s inside a long round
✓ Auto-pause when a call comes in, so you don't get beeped at mid-conversation
✓ Vibration on interval change, keep-screen-on, battery-optimization exemption helper for aggressive OEMs

WHY ATHLETES CHOOSE THIS TIMER

• The timer keeps running with the screen off, backed by a real foreground service.
• No ad standing between you and your workout — there are no ads at all.
• Your music keeps playing — audio focus is borrowed for a beat, never stolen.
• Pay once for Pro — a single lifetime purchase, never a subscription.

PRO — ONE-TIME PURCHASE

★ Unlimited saved workouts
★ Per-interval sounds — 4 beep patterns or a custom spoken phrase for each interval
★ Export / import workouts as JSON files — share routines or move phones
★ 2×1 home-screen widget with quick-start buttons
★ Workout history — every finished session logged, with total time and a day streak
★ Reaction training — random cues inside your work intervals, like an unpredictable sparring round
★ Halfway voice cue and rounds-remaining announcements