# The Wolff Timer vs Strike Timer Interval Training

The clearest difference is in-app purchases: The Wolff Timer at none against Strike Timer Interval Training's 1. Strike Timer Interval Training's advantage is iOS requirement (15.1 vs 17.2). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Strike Timer Interval Training sells 1 in-app purchase, starting at $14.99 per year. The Wolff Timer asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 3 weeks. Both last shipped on September 11, 2026.

## The numbers

| Metric | The Wolff Timer | Strike Timer Interval Training |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Size | 3 MB | 47 MB |
| Requires iOS | 17.2 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Jimmi Wolff](https://appshunter.io/developer/1871899583) | [Shannon Kempenich](https://appshunter.io/developer/579568236) |

## What reviewers say

### The Wolff Timer

[App page](https://appshunter.io/ios/app/the-wolff-timer/id6758272038)

**Features:** macOS Compatibility

**In-app purchases:** none


### Strike Timer Interval Training

[App page](https://appshunter.io/ios/app/strike-timer-interval-training/id6761288575)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Strike Timer Pro | $14.99 | per year |


## Frequently asked questions

### Is The Wolff Timer free?

The Wolff Timer is free to download, with no in-app purchases.

### Is Strike Timer Interval Training free?

Strike Timer Interval Training is free to download, with in-app purchases available.

### Do The Wolff Timer or Strike Timer Interval Training have ads?

Neither The Wolff Timer nor Strike Timer Interval Training shows ads.

### Which is updated more often, The Wolff Timer or Strike Timer Interval Training?

The Wolff Timer ships an update every 3 weeks, and Strike Timer Interval Training every 3 weeks. Most recently, The Wolff Timer was updated on September 11, 2026 and Strike Timer Interval Training on September 11, 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.*