# Circuit Timer: Interval & HIIT — Tabata, Boxing & Gym Workouts

> Tabata, Boxing & Gym Workouts (iPhone/iPad app by Lawman Services, LLC.)

- Source: https://appshunter.io/ios/app/circuit-timer-interval-and-hiit/id6759834943 (this page in markdown: same URL + `.md`)
- Developer: [Lawman Services, LLC](https://appshunter.io/developer/446643752)
- Category: Health & Fitness
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 26.0 · 7 MB
- Languages: American English
- Released: 2026-03-05
- Data updated: 2026-10-24

## What is Circuit Timer?

Build your own interval circuits for HIIT, Tabata, boxing rounds, EMOM and circuit training, then run them with precise timing, voice announcements, sounds and haptics.

CREATE YOUR PERFECT WORKOUT
Design circuits with unlimited intervals, each with its own name, duration and alarm sound. Repeat single intervals or the whole circuit, by count or for a set time. Choose from 24 alarm sounds, a spoken countdown, or both.

STAY IN THE ZONE
A full-screen player with a progress ring, countdown and interval timeline keeps you focused. The final seconds of each interval pulse so you're ready for what's next, and voice announcements call out each interval by name, so you never have to look at your screen.

TRAIN WITH YOUR MUSIC
Interval sounds play over your music instead of pausing it. The current interval and countdown stay on your Lock Screen and in the Dynamic Island, and cues keep working through phone calls. Start any circuit hands-free with Siri.

APPLE WATCH
Run circuits from your wrist with live heart rate, heart rate zones, active calories and a tap at every interval change. Starting a workout on your iPhone? Your watch follows along with the same taps and your heart rate. A Smart Stack card keeps the current interval in view, even with the app closed.

TRACK YOUR PROGRESS
See your workout history with streaks, completion stats and total training time. Save workouts to Apple Health as High Intensity Interval Training.

FREE TO START
• 1 circuit with every feature: alarms, haptics, voice and history

CORE UPGRADE
• Unlimited circuits
• iCloud sync across your devices
• Apple Health

PRO UPGRADE
• Everything in Core
• Apple Watch app

Both upgrades are one-time purchases. No subscription.

Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Core | $2.99 | one-time |
| Pro | $4.99 | one-time |


## Is Circuit Timer safe?

Not enough ratings yet to assess Circuit Timer.

## Is Circuit Timer legit?

Circuit Timer: Interval & HIIT appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Circuit Timer is 75 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 5 releases)

### 1.1.1 — 2026-10-05

• Small improvements and fixes.

### 1.1 — 2026-08-22

NEW  
• Lock Screen countdown: see your current interval on the Lock Screen and in the Dynamic Island while a workout runs.
• Apple Watch Smart Stack card: your current interval and countdown appear in the Smart Stack, even with the watch app closed. Add the Circuit Timer widget to your Smart Stack to see it.
• Wrist taps and heart rate: follow a phone workout from your watch and get a tap at each interval, plus your live heart rate.
  
IMPROVEMENTS
• Workout sounds now play over your music instead of interrupting it.
• Cues keep working through phone calls and other interruptions.
• Fewer notifications: workout cues now play as sounds instead of banners.
  
FIXES
• Workouts now save to Apple Health reliably.
• Smoother sound on Apple Watch, with no stutter or lag.
• Dozens of smaller fixes across timers, widgets, the watch app, history, and purchases.

### 1.0.3 — 2026-07-03

- Siri & Shortcuts: The "Start Circuit" action now actually starts your timer instead of just opening the app — ideal when your hands are busy and you can't look at the screen.
- Quick Start widget: Tapping a circuit in the home-screen widget now launches it straight into the running player.

### 1.0.2 — 2026-03-25

Improved the Apple Watch experience with more responsive countdown timing, clearer countdown audio, cleaner interval-end playback, and better haptics during interval changes.

### 1.0.1 — 2026-03-21

This update improves alarm timing and Apple Watch playback reliability.

Fixed a delay that could affect the final alarm at the end of a circuit
Improved Apple Watch alarm and countdown sound playback
Added a Default option for interval alarm sounds
Improved the player layout on iPad
Other bug fixes and polish

## Apps similar to Circuit Timer

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Gym Circuit Timer](https://appshunter.io/ios/app/gym-circuit-timer/id6759989821) | — | Free | Health & Fitness |
| [ChainFlow: Interval Timer](https://appshunter.io/ios/app/chainflow-interval-timer/id6755700190) | 5.0 (1) | Free | Health & Fitness |
| [Custom Interval Workout Timer](https://appshunter.io/ios/app/custom-interval-workout-timer/id6759209042) | — | Free | Health & Fitness |
| [Metta Timer](https://appshunter.io/ios/app/metta-timer/id6760636068) | 5.0 (3) | Free | Health & Fitness |
| [PeakTimer](https://appshunter.io/ios/app/peaktimer/id6778466169) | — | Free | Health & Fitness |
| [Gym Timer Docali](https://appshunter.io/ios/app/gym-timer-docali/id6777826409) | 5.0 (2) | Free | Health & Fitness |

## More apps by Lawman Services, LLC

- [Circuit Timer](https://appshunter.io/ios/app/circuit-timer/id446643749)
- [Driio: Network Drive Client](https://appshunter.io/ios/app/driio-network-drive-client/id6757922119)

All apps by Lawman Services, LLC: https://appshunter.io/developer/446643752

## Related topics

[circuit timer](https://appshunter.io/ios/topics/circuit-timer) · [circuit timer train](https://appshunter.io/ios/topics/circuit-timer-train)

---

*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 2026-10-24.*