IntervalFlow: HIIT Timer

IntervalFlow is a beautifully simple HIIT and interval timer — and every feature is free.

No paywalls. No pop-up ads in the middle of your workout. Just a fast, focused timer that gets out of your way so you can train.

WHY INTERVALFLOW

• Everything free — custom intervals, unlimited presets, stats. Nothing locked behind a subscription.
• Color-coded countdown notification — your current phase, time left, and round stay on the lock screen and status bar. Glance mid-set without opening the app.
• Quick Settings tile — start or pause your timer straight from the notification shade.
• No interruptions — a small banner only. Never a forced full-screen ad while you're working out.

BUILT FOR REAL WORKOUTS

• Ready-made presets: Tabata, HIIT 40/20, EMOM, Boxing rounds, and multi-set circuits.
• Custom builder: set prepare, work, rest, rounds, sets, rest between sets, and cooldown — in seconds.
• Big, clear countdown with color-coded phases (work, rest, get ready, cooldown).
• Sound, vibration, and optional voice cues so you can keep your eyes off the screen.
• Keeps running with the screen off, so the timer never stops mid-round.

TRACKS ITSELF

• Every finished session is logged automatically — time, rounds, and estimated calories.
• Daily streak and weekly count to keep you consistent.

• Material You — the app adapts to your wallpaper colors on Android 12+.

Perfect for HIIT, Tabata, cross-training, boxing, running intervals, stretching, EMOM, and circuit training — at the gym or at home.

Download IntervalFlow and start your first interval in seconds. Free, forever.