# IntervalTimer vs Contraction Timer

The clearest difference is update cadence: IntervalTimer at weekly against Contraction Timer's every 6 weeks. IntervalTimer also leads on device support (3 vs 1) and iOS requirement (15.1 vs 17.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. IntervalTimer sells 1 one-off in-app purchase and Contraction Timer sells 3 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.

IntervalTimer ships an update weekly, Contraction Timer every 6 weeks. The most recent releases landed on October 25, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | IntervalTimer | Contraction Timer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 6 weeks |
| Size | 52 MB | 1 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [naoki otsu](https://appshunter.io/developer/1082476153) | [App Harbour ApS](https://appshunter.io/developer/1858231299) |

## What reviewers say

### IntervalTimer

[App page](https://appshunter.io/ios/app/intervaltimer-workout-timer/id6761044639)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium (Pay Once) | $4.99 | one-time |


### Contraction Timer

[App page](https://appshunter.io/ios/app/contraction-timer-bumpy/id6780880864)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium | $3.99 | per 7 days |
| Annual Premium | $19.99 | per year |
| Lifetime Unlock | $29.99 | one-time |


## Frequently asked questions

### Is IntervalTimer free?

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

### Is Contraction Timer free?

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

### Do IntervalTimer or Contraction Timer have ads?

Neither IntervalTimer nor Contraction Timer shows ads.

### Which is updated more often, IntervalTimer or Contraction Timer?

IntervalTimer ships an update weekly, and Contraction Timer every 6 weeks. Most recently, IntervalTimer was updated on October 25, 2026 and Contraction Timer on October 11, 2026.

---

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