# IntervalForge: HIIT & Tabata — Gym Workout, No Subscription

> Gym Workout, No Subscription (iPhone/iPad app by Shuto Nishiyama.)

- Source: https://appshunter.io/ios/app/intervalforge-hiit-and-tabata/id6759606731 (this page in markdown: same URL + `.md`)
- Developer: [Shuto Nishiyama](https://appshunter.io/developer/1879174354)
- Category: Health & Fitness, Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 26.0 · 2 MB
- Languages: American English, Dutch, French (France), German (Germany), Italian, Japanese, Korean, Brazilian Portuguese, Chinese (Simplified, China), European Spanish and 1 more
- Released: 2026-03-21
- Data updated: 2026-09-29

## What is IntervalForge?

Giant 72pt digits you can read from across the gym. Live countdown on your Lock Screen and Dynamic Island. Pay once, keep it forever — no subscription.

Built for HIIT, Tabata, circuits and strength training. The whole screen turns red for work and green for rest, so one glance tells you what to do next.

READY IN ONE TAP
Three presets are included: Tabata (20s/10s × 8), HIIT 30/15 and a 3-exercise Circuit. Pick one and go.

QUICK REST TIMER FOR LIFTING — NEW
Between sets, one tap starts a 60, 90, 120 or 180-second rest. No setup needed.

SIRI, SHORTCUTS & CONTROL CENTER — NEW
Start a workout or a rest timer with Siri, a Shortcut or a Control Center button. The new Home Screen widget quick-starts your favorite workouts or a rest timer.

LOCK SCREEN & DYNAMIC ISLAND
Live Activity shows the running countdown without opening the app — free for everyone.

KEEPS RUNNING IN THE BACKGROUND
Lock your phone or switch apps: the timer keeps going and notifications mark every interval change. Your music is lowered, not stopped.

BUILD YOUR OWN WORKOUT
Set work and rest times, sets, rest between sets and an exercise name for each interval. Total time remaining is always on screen. Workout history and a weekly summary keep you consistent.

PRO — ONE-TIME PURCHASE
No monthly fees, ever. Pro is a single purchase that unlocks:
- Unlimited custom workouts
- Editable presets
- Voice guidance: hear each exercise, set and a 10-second warning without looking at your phone (NEW)
The free version includes all 3 presets and 1 custom workout.

FEATURES
- No subscription — buy Pro once
- 72pt full-screen display, color-coded work/rest
- Live Activity on Lock Screen & Dynamic Island (free)
- Quick rest timer: 60/90/120/180s (free)
- Siri, Shortcuts & Control Center (free)
- Home Screen widget: quick-start favorites or a rest timer (free)
- Reliable background timer with notifications
- Plays nicely with your music
- 3-second countdown and haptics
- Exercise names per interval
- Workout history & weekly summary
- Screen stays awake during workouts

Questions or ideas? Leave a review or contact us from the support page.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| IntervalForge Pro | $2.99 | one-time |


## Is IntervalForge safe?

Not enough ratings yet to assess IntervalForge.

## Is IntervalForge legit?

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


## Version history (last 5 releases)

### 1.1.0 — 2026-09-22

Version 1.1.0 is a big update:

- Quick rest timer: one tap for 60/90/120/180s between sets
- Siri, Shortcuts & Control Center: start a workout or rest timer instantly
- Home Screen widget (free): quick-start favorite workouts or a rest timer
- Voice guidance (Pro): hear each exercise, set and a 10-second warning without looking at your phone
- Exercise names per interval and total time remaining on screen

Still no subscription. Enjoy your training!

### 1.0.6 — 2026-07-14

Minor improvements.

### 1.0.5 — 2026-06-21

Minor improvements.

### 1.0.4 — 2026-04-29

Minor improvements.

### 1.0.3 — 2026-04-14

Minor improvements.

## Apps similar to IntervalForge

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [HIIT & Tabata Timer with Music](https://appshunter.io/ios/app/hiit-and-tabata-timer-with-music/id6754508192) | — | Free | Health & Fitness |
| [Everyone's Tabata Timer](https://appshunter.io/ios/app/everyones-tabata-timer/id6783721406) | — | Free | Health & Fitness |
| [Cyca Interval Timer](https://appshunter.io/ios/app/cyca-interval-timer/id6785018234) | — | Free | Health & Fitness |
| [SumCha: Interval Running](https://appshunter.io/ios/app/sumcha-interval-running/id6819497314) | — | Free | Health & Fitness |
| [Interval Timer: Focus & HIIT](https://appshunter.io/ios/app/interval-timer-focus-and-hiit/id6795139230) | — | Free | Health & Fitness |
| [Watchdog Health](https://appshunter.io/ios/app/watchdog-health/id6756896032) | — | Free | Health & Fitness |

## More apps by Shuto Nishiyama

- [ScanPDF: Document Scanner](https://appshunter.io/ios/app/scanpdf-document-scanner/id6759512455)
- [MuscleMemo - Workout Log](https://appshunter.io/ios/app/musclememo-workout-log/id6759721047)
- [CopyPaste AI - Formal & Email](https://appshunter.io/ios/app/copypaste-ai-formal-and-email/id6761990947)
- [ラーメンスナップ - 食べ歩き日記・一杯の記録](https://appshunter.io/ios/app/id6811273487)
- [Omosa: Simple Weight Log](https://appshunter.io/ios/app/omosa-simple-weight-log/id6815102760)

All apps by Shuto Nishiyama: https://appshunter.io/developer/1879174354

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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 2026-09-29.*