# HIIT Timer - IntervalFlow — Interval, Tabata & round timer

> Interval, Tabata & round timer (iPhone/iPad app by Hyunwoo Lee.)

- Source: https://appshunter.io/ios/app/hiit-timer-intervalflow/id6788945849 (this page in markdown: same URL + `.md`)
- Developer: [Hyunwoo Lee](https://appshunter.io/developer/1883358620)
- Category: Health & Fitness, Sports
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 2 MB
- Languages: Russian, Bangla, Bulgarian, Hindi, Vietnamese, American English, Hungarian, Dutch, Greek, Danish and 22 more
- Released: 2026-07-16
- Data updated: 2026-11-05

## What is HIIT Timer?

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.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| IntervalFlow Pro | $9.99 | one-time |


## Is HIIT Timer safe?

Not enough ratings yet to assess HIIT Timer.

## Is HIIT Timer legit?

HIIT Timer - IntervalFlow appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for HIIT Timer is 65 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 5 releases)

### 1.3.1 — 2026-11-04

• After your first fully completed workout, IntervalFlow shows once what Pro adds. Close it with Done — it won't come back, and nothing you already use is locked.
• Rating requests now appear only after a finished workout, never after one you stopped early.

### 1.3.0 — 2026-09-21

• 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.

### 1.2.0 — 2026-09-07

The app now speaks 32 languages, up from 12 — every screen, cue and label. The Lock Screen Live Activity is localized too; it used to show the round in English no matter your language.

### 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.

## Apps similar to HIIT Timer

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [HIIT 974](https://appshunter.io/ios/app/hiit-974/id6779238521) | — | Free | Health & Fitness |
| [easyTimer - 운동 휴식 타이머](https://appshunter.io/ios/app/easytimer/id6774846182) | — | Free | Health & Fitness |
| [Timee: Focus Timer & HIIT](https://appshunter.io/ios/app/timee-focus-timer-and-hiit/id6758425319) | — | Free | Health & Fitness |
| [Between: Workout Timer](https://appshunter.io/ios/app/between-workout-timer/id6816556973) | 4.8 (4) | Free | Health & Fitness |
| [WaterTracker - LifeTracker](https://appshunter.io/ios/app/watertracker-lifetracker/id6780416566) | — | Free | Health & Fitness |
| [Intervals One: Interval Timer](https://appshunter.io/ios/app/intervals-one-interval-timer/id6741439106) | — | Free | Health & Fitness |

## More apps by Hyunwoo Lee

- [Godlife Timer: Focus & Study](https://appshunter.io/ios/app/godlife-timer-focus-and-study/id6760225624)
- [Daily Coding](https://appshunter.io/ios/app/daily-coding/id6762553257)
- [QR Pocket Wallet](https://appshunter.io/ios/app/qr-pocket-wallet/id6762613775)
- [나가두돼? - 미세먼지 외출판단](https://appshunter.io/ios/app/id6766875936)
- [Time Blocks - 4 Hour Journal](https://appshunter.io/ios/app/time-blocks-4-hour-journal/id6776194738)
- [로또 당첨확인 - QR·통계](https://appshunter.io/ios/app/qr/id6782917980)

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 2026-11-05.*