# Custom Interval Workout Timer vs Interval Timer by STRNTH

The clearest difference is update cadence: Interval Timer by STRNTH at every 10 days against Custom Interval Workout Timer's every 2 months. Interval Timer by STRNTH also leads on iOS requirement (15.1 vs 17.0). On price, ads, 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 Interval Timer by STRNTH sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Custom Interval Workout Timer ships an update every 2 months, Interval Timer by STRNTH every 10 days. The most recent releases landed on October 15, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Custom Interval Workout Timer | Interval Timer by STRNTH |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 2 months | **Every 10 days** |
| Size | 7 MB | 55 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, iPad, Apple Watch | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 12+ |
| Developer | [Michael McGill apps llc](https://appshunter.io/developer/1874084552) | [Next Big Leap Ltd](https://appshunter.io/developer/369344938) |

## 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 |


### Interval Timer by STRNTH

[App page](https://appshunter.io/ios/app/interval-timer-by-strnth/id6787253056)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove ads | $9.99 | 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 Interval Timer by STRNTH free?

Interval Timer by STRNTH is free to download, with in-app purchases available.

### Do Custom Interval Workout Timer or Interval Timer by STRNTH have ads?

Both Custom Interval Workout Timer and Interval Timer by STRNTH show ads.

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

Custom Interval Workout Timer ships an update every 2 months, and Interval Timer by STRNTH every 10 days. Most recently, Custom Interval Workout Timer was updated on October 15, 2026 and Interval Timer by STRNTH on October 5, 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.*