# Peak Intervals vs Circuit Timer

The clearest difference is update cadence: Peak Intervals at every 4 days against Circuit Timer's monthly. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Peak Intervals sells 2 in-app purchases, starting at $9.99 per month and Circuit Timer sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Peak Intervals ships an update every 4 days, Circuit Timer monthly. The most recent releases landed on September 25, 2026 and September 3, 2026 respectively.

## The numbers

| Metric | Peak Intervals | Circuit Timer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Monthly |
| Size | 13 MB | 7 MB |
| Requires iOS | 26.0 | 26.0 |
| Devices | iPhone, Apple Watch | **iPhone, iPad, Apple Watch** |
| Age rating | 17+ | 4+ |
| Developer | [Justin Polidori](https://appshunter.io/developer/1866410754) | [Lawman Services, LLC](https://appshunter.io/developer/446643752) |

## What reviewers say

### Peak Intervals

[App page](https://appshunter.io/ios/app/peak-intervals/id6757667069)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro | $9.99 | per month |
| Pro Yearly | $49.99 | 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 Peak Intervals free?

Peak Intervals 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 Peak Intervals or Circuit Timer have ads?

Neither Peak Intervals nor Circuit Timer shows ads.

### Which is updated more often, Peak Intervals or Circuit Timer?

Peak Intervals ships an update every 4 days, and Circuit Timer monthly. Most recently, Peak Intervals was updated on September 25, 2026 and Circuit Timer on September 3, 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.*