# Custom Interval Workout Timer vs Circuit Timer

The clearest difference is ads: Circuit Timer at none against Custom Interval Workout Timer's shown. Custom Interval Workout Timer's advantage is iOS requirement (17.0 vs 26.0). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Custom Interval Workout Timer sells 2 in-app purchases, starting at $1.99 per month and Circuit Timer sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Custom Interval Workout Timer ships an update every 3 weeks, Circuit Timer monthly. The most recent releases landed on September 10, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Custom Interval Workout Timer | Circuit Timer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 3 weeks** | Monthly |
| Size | 7 MB | 7 MB |
| Requires iOS | **17.0** | 26.0 |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Michael McGill apps llc](https://appshunter.io/developer/1874084552) | [Lawman Services, LLC](https://appshunter.io/developer/446643752) |

## What reviewers say

### Custom Interval Workout Timer

[App page](https://appshunter.io/ios/app/custom-interval-workout-timer/id6759209042)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $1.99 | per month |
| Yearly | $19.99 | per year |


### Circuit Timer

[App page](https://appshunter.io/ios/app/circuit-timer/id6759834943)

**Features:** macOS Compatibility, Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (2)**

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


## Frequently asked questions

### Is Custom Interval Workout Timer free?

Custom Interval Workout Timer is free to download, with in-app purchases available.

### Is Circuit Timer free?

Circuit Timer is free to download, with in-app purchases available.

### Do Custom Interval Workout Timer or Circuit Timer have ads?

Custom Interval Workout Timer shows ads; Circuit Timer does not.

### Which is updated more often, Custom Interval Workout Timer or Circuit Timer?

Custom Interval Workout Timer ships an update every 3 weeks, and Circuit Timer monthly. Most recently, Custom Interval Workout Timer was updated on September 10, 2026 and Circuit Timer on September 17, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*