# Interval. — HIIT & Interval Timer

> HIIT & Interval Timer (iPhone/iPad app by Meng-Yu Ho.)

- Source: https://appshunter.io/ios/app/interval/id6771282686 (this page in markdown: same URL + `.md`)
- Developer: [Meng-Yu Ho](https://appshunter.io/developer/1896776663)
- Category: Health & Fitness, Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 2 MB
- Languages: American English, Chinese (Simplified, China), Chinese (Traditional, Taiwan)
- Released: 2026-05-24
- Data updated: 2026-10-28

## What is Interval.?

Interval. is the cleanest, most focused interval timer for your workouts.

Whether you're doing Tabata, EMOM, or your own custom protocol — set it up in seconds and go. No clutter. No ads. Just the timer.

HOW IT WORKS

Create a plan with your work duration, rest duration, and number of sets. Then hit start. Interval. handles the countdown with clear visual and audio cues so you never have to look at your phone.

FEATURES

• Clean, distraction-free dark interface
• Colour-coded phases — orange for work, cyan for rest
• Circular progress ring with large countdown display
• Countdown beeps in the final 3 seconds of each phase
• Haptic feedback on phase transitions
• Screen stays on while the timer is running
• Swipe to delete, long-press to edit your plans
• Your first 5 workouts are free. A one-time purchase removes all limits and includes the Apple Watch app — no subscription

APPLE WATCH SUPPORT

Leave your phone behind. With the standalone Apple Watch app (included with the one-time purchase), you can start, view, and control your HIIT intervals right from your wrist. Haptic taps guide you through work and rest phases without ever needing to look at a screen.

BUILT FOR FOCUS

Every design decision in Interval. is about keeping you in the workout. The screen is black to minimise distractions. The numbers are big so you can read them from across the room. The audio cues mean you don't need to watch the screen at all.

From simpleThings. — made with care, for people who train.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Unlimited Workouts & Plans | $1.99 | one-time |


## Is Interval. safe?

Not enough ratings yet to assess Interval..

## Is Interval. legit?

Interval. has limited verification signals. The AppsHunter Legitimacy Score for Interval. is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 4 releases)

### 1.4 — 2026-10-27

• Unlock Interval. right from the home screen to remove all limits, including the Apple Watch app.
• Used Interval. before this update? Everything works just as before.
• The Privacy Policy is now available inside the app.
• Clearer timer sounds that play even in Silent Mode.
• Fixed an issue where the timer restarted when rotating a larger iPhone or resizing the window on iPad during a workout.

### 1.3 — 2026-06-20

Initial release. Simple, focused interval training — the way it should be.

Now fully supports iPad and Apple Watch. Train on the big screen, or leave your devices behind and let your wrist guide you.

### 1.2 — 2026-05-28

What’s New:

Apple Watch Support: Leave your phone behind! Sync your custom HIIT plans to your Apple Watch and train right from your wrist, complete with precise haptic cues for every work and rest phase.
Unlock Unlimited & Watch App: We've introduced a one-time purchase option. Free users can create up to 2 training plans. Upgrade once to unlock unlimited custom plans and full Apple Watch support forever.
General Polish: Squashed a few bugs and improved the timer's background stability so you never miss a beat.

### 1.0 — 2026-05-24

No release notes.

## Apps similar to Interval.

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [4-7-8 Breathe](https://appshunter.io/ios/app/4-7-8-breathe/id6758927414) | — | Free | Health & Fitness |
| [ABIT: Custom Exercise Programs](https://appshunter.io/ios/app/abit-custom-exercise-programs/id1274605002) | 4.8 (60) | Free | Health & Fitness |
| [PaceMaster: Marathon Trainer](https://appshunter.io/ios/app/pacemaster-marathon-trainer/id6449989149) | 5.0 (1) | Free | Health & Fitness |
| [Interval Timer: BeepWatch](https://appshunter.io/ios/app/interval-timer-beepwatch/id1048461382) | 4.8 (164) | Free | Health & Fitness |
| [Intervals: HIIT & Tabata Timer](https://appshunter.io/ios/app/intervals-hiit-and-tabata-timer/id6742316650) | 4.3 (9) | Free | Health & Fitness |
| [Calc Run: Running Tracker](https://appshunter.io/ios/app/calc-run-running-tracker/id6742862170) | 5.0 (4) | Free | Health & Fitness |

## More apps by Meng-Yu Ho

- [Refill.](https://appshunter.io/ios/app/refill/id6776298966)

All apps by Meng-Yu Ho: https://appshunter.io/developer/1896776663

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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 2026-10-28.*