Interval Flow

Stop missing intervals. IntervalFlow is a free, no-button HIIT interval timer that keeps you in the zone with full-screen color cues, strong vibration pulses, short voice prompts, and blind gestures. Built for real training Works with any interval-based sport: treadmill sprints, spinning, jump rope, rowing, battle ropes, and classic Tabata. Pick a preset, hit start, and follow the colors: - Amber = Prepare: get set - Red = Work: give it your all - Green = Rest: recover A huge, glanceable countdown switches phases automatically, round after round, until you're done — then shows your total time and completed rounds. Control it without looking - Double-tap anywhere on screen: pause or resume - Long-press anywhere: finish the workout No tiny buttons to miss mid-sprint, and the screen stays on while you train. See it, feel it, hear it - Short voice cues call out every phase: "Let's go" for work, "Time to rest" for rest, "Workout completed!" when you're done - A 3-2-1 beep counts down the final seconds before each phase - A triple vibration pulse fires the instant a work or rest phase begins, and again at 3 seconds left - Prefer silence? Turn sound cues off in one tap on the setup screen, and train on colors and vibration alone — perfect with music blasting or in a noisy gym Never loses time - Drift-free timing engine: accurate to within 1 second over 30+ minute sessions - Keeps running on the lock screen and in the background - Live notification lets you pause, resume, or finish right from the status bar Your workouts, your rules - 4 built-in presets: Treadmill Sprint, Jump Rope HIIT, Classic Tabata, Spinning Sprint - Adjust work, rest, and rounds in seconds; save unlimited custom presets with your own names - Remembers your last selection Privacy first Free to use. No account needed — your workouts never leave your device, and no sensitive permissions are requested. A single lightweight banner ad on the setup screen — never during your workout. Start your next interval — and finish it strong.