# IntervalFlow: HIIT Timer — HIIT interval & Tabata timer

> HIIT interval & Tabata timer (iPhone/iPad app by Hyunwoo Lee.)

- Source: https://appshunter.io/ios/app/intervalflow-hiit-timer/id6788945849 (this page in markdown: same URL + `.md`)
- Developer: [Hyunwoo Lee](https://appshunter.io/developer/1883358620)
- Category: Health & Fitness, Sports
- Price: Free
- Age rating: 4+
- Requires: iOS 17.0 · 1 MB
- Languages: American English, French (France), German (Germany), Indonesian, Italian, Japanese, Korean, Brazilian Portuguese, Russian, Chinese (Simplified, China) and 2 more
- Released: 2026-07-16
- Data updated: 2026-08-13
- User reviews in markdown: https://appshunter.io/ios/app/intervalflow-hiit-timer/id6788945849/reviews.md

## What is IntervalFlow?

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 — the current phase, the countdown, and the round stay on your Lock Screen. Check mid-set without unlocking.

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.


## Version history (last 3 releases)

### 1.1.0 — 2026-08-12

Meet IntervalFlow Pro (one-time purchase): name your intervals and hear them called out, voice preview of what's next, finish countdown (3/5/10s), per-preset sound, haptic & voice settings, plus +10s and repeat-interval during a workout. Everything you already use stays as it is.

### 1.0.1 — 2026-08-11

No more ads. The app no longer asks for tracking permission, and every screen is free of banners and interstitials.

### 1.0 — 2026-07-16

No release notes.

## More apps by Hyunwoo Lee

- [Daily Coding](https://appshunter.io/ios/app/daily-coding/id6762553257)
- [QR Pocket Wallet](https://appshunter.io/ios/app/qr-pocket-wallet/id6762613775)
- [Time Blocks - 4 Hour Journal](https://appshunter.io/ios/app/time-blocks-4-hour-journal/id6776194738)
- [PixCross: Nonogram Puzzle](https://appshunter.io/ios/app/pixcross-nonogram-puzzle/id6785192456)
- [Dropzle: Water Sort Puzzle](https://appshunter.io/ios/app/dropzle-water-sort-puzzle/id6785240605)
- [PixPaint - Pixel Art Coloring](https://appshunter.io/ios/app/pixpaint-pixel-art-coloring/id6787232518)

All apps by Hyunwoo Lee: https://appshunter.io/developer/1883358620

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-13.*