IntervalFlow: HIIT Timer

Hyunwoo Lee · Health & Fitness

Free

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Chart standing · US

Not currently charting in this storefront.

What changed · US

Listing changes AppTracker has observed for this app in this storefront — new versions, price moves, rating shifts, and store copy.

Sep 21, 2026
New version 1.2.0 → 1.3.0

• First-run guide: four short pages that show how a workout runs, then you're in. • Presets grouped by purpose — HIIT, running, strength & core, mobility — and Copy to edit: duplicate any built-in workout and tune it. • Hear before you buy: a 15-second voice sample on the Pro screen. • Voice cues in all 32 languages, and steadier countdowns when you come back to the app.

Sep 7, 2026
New version 1.1.0 → 1.2.0
Aug 26, 2026
New version 1.0 → 1.1.0

In-app purchases · US

What this app sells inside itself, grouped by kind and priced for this storefront.

One-time purchases
IntervalFlow Pro $4.99

Screenshots

About

A HIIT and interval timer that stays out of your way. No ads. No tracking. Nothing interrupts your workout. WHY INTERVALFLOW • No ads, ever — not a banner, not a video, not between rounds. Your countdown is never covered and your audio is never cut. • No tracking — no analytics, no advertising identifier, no account. Your workouts stay on your device. • Live Activity and Dynamic Island — your total time left stays on the Lock Screen and in the Dynamic Island. The screen stays awake while a workout is running, and when you return to the app the current phase is recalculated instantly, without replaying missed cues. BUILT FOR REAL WORKOUTS • Ready-made presets: Tabata, HIIT 40/20, EMOM, boxing rounds, and multi-set circuits. • Custom builder: prepare, work, rest, rounds, sets, rest between sets, and cooldown — to the second. • A countdown you can read across the room, with each phase in its own colour: work, rest, get ready, cooldown. • Sound, haptics, and voice cues, so you can keep your eyes off the screen and on the set. IT KEEPS THE RECORD • Every finished session is logged on its own — time, rounds, and an estimate of calories. • A daily streak and a weekly count, for the weeks when motivation needs a number. Made for HIIT, Tabata, cross-training, boxing, running intervals, stretching, EMOM, and circuits — at the gym or on your living room floor. Open it, tap a preset, and start. That is the whole app.

What's new · 1.3.0

• First-run guide: four short pages that show how a workout runs, then you're in. • Presets grouped by purpose — HIIT, running, strength & core, mobility — and Copy to edit: duplicate any built-in workout and tune it. • Hear before you buy: a 15-second voice sample on the Pro screen. • Voice cues in all 32 languages, and steadier countdowns when you come back to the app.

Details

DeveloperHyunwoo Lee
ReleasedJul 2026
UpdatedJul 2026
Version1.3.0
Size3.7 MB
RequiresiOS 17.0 or later
Age rating4+
LanguagesChinese, English, French, German, Indonesian, Italian, Japanese, Korean, Portuguese, Russian, Spanish
PriceFree
Categories Health & FitnessSports
Bundle IDcom.appfactory.intervalflow