# IntervalSmith — HIIT, Tabata & Circuit Timer

> HIIT, Tabata & Circuit Timer (iPhone/iPad app by Frank Fattizzi.)

- Source: https://appshunter.io/ios/app/intervalsmith/id6808835732 (this page in markdown: same URL + `.md`)
- Developer: [Frank Fattizzi](https://appshunter.io/developer/1059014622)
- Category: Health & Fitness, Sports
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.6 · 3 MB
- Languages: American English
- Released: 2026-10-01
- Data updated: 2026-10-09
- User reviews in markdown: https://appshunter.io/ios/app/intervalsmith/id6808835732/reviews.md

## What is IntervalSmith?

IntervalSmith is a precision interval timer built around the way you actually train. Stack warm-up, exercise, rest, and cool-down stages into unlimited sections, set repeats per section, and let the app run the clock while you run the workout.

BUILD YOUR WORKOUT
Create any interval structure in seconds. Add multiple sections, each with its own stages and repeat count. Need rest between rounds? Set it once — IntervalSmith handles the math automatically.

AUDIO & HAPTIC CUES
Never miss a transition. Distinct tones mark each stage type, a 3-2-1 countdown ticks before every change, and an optional halfway alert helps you pace yourself. Everything works through your headphones.

APPLE WATCH (Pro)
Run your workout from your wrist. The Watch app mirrors your full interval structure with a smooth progress ring and live countdown — staying accurate even when your wrist is down. Always On Display compatible.

TEMPLATE LIBRARY (Pro)
Browse ready-made workouts — Tabata, AMRAP, EMOM, strength circuits, yoga flows, and more — and add them to your library with one tap.

IMPORT & EXPORT (Pro)
Share workouts with training partners or back them up. Export any workout as a file and import from other IntervalSmith users.

HEALTHKIT (Pro)
Save every session to Apple Health automatically. Workouts are classified by activity type — running, yoga, strength training, cycling, and more — so your rings close and your stats stay accurate.

WORKOUT HISTORY (Pro)
Every session is logged with completion time, duration, and whether you finished.

FREE & PRO
IntervalSmith is free with unlimited custom workouts. Upgrade to Pro with a single one-time purchase — no subscriptions, no recurring fees — to unlock the Watch app, full history, Template Library and Import & Export. Pro includes Family Sharing.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| IntervalSmith Pro | $4.99 | one-time |



## Version history (last 3 releases)

### 1.4 — 2026-10-03

• Fixed an issue preventing the Pro upgrade from being purchased.

### 1.3 — 2026-10-02

• Workout history now saves to Apple Health for everyone — no longer limited to Pro.
• Added more starter workouts for new installs.
• Fixed an issue where audio cues (stage announcements, countdowns) could stop playing after a phone call interrupted a workout.
• Improved iPhone/Apple Watch timer sync so stage timing stays accurate throughout longer workouts, even without pausing or skipping.
• Fixed a sync issue that could occasionally cause saved presets to go missing when setting up IntervalSmith on a new device.
• Delete confirmation dialogs are now centered and clearly show which workout is being deleted.
• Minor settings and interface cleanup.

### 1.2 — 2026-10-01

No release notes.

## More apps by Frank Fattizzi

- [PassGen Plus](https://appshunter.io/ios/app/passgen-plus/id1059014623)

All apps by Frank Fattizzi: https://appshunter.io/developer/1059014622

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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 2026-10-09.*