# Chronometer vs iTosh

The clearest difference is price: iTosh at Free against Chronometer's $2.99. iTosh also leads on update cadence (every 3 weeks vs every 5 months) and iOS requirement (12.0 vs 18.6). On ads, in-app purchases and device support there is nothing between them.

iTosh is free to download; Chronometer costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Chronometer ships an update every 5 months, iTosh every 3 weeks. The most recent releases landed on October 8, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Chronometer | iTosh |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[3.1 (8 ratings)](https://appshunter.io/ios/app/chronometer/id1562013733/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 weeks** |
| Monetization | Paid | — |
| Size | 3 MB | 10 MB |
| Requires iOS | 18.6 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Kilian Eisenegger](https://appshunter.io/developer/1333678887) | [Fabio Elia](https://appshunter.io/developer/1449001502) |

## What reviewers say

### Chronometer

[App page](https://appshunter.io/ios/app/chronometer/id1562013733)

Easily track your watch's accuracy against atomic time. Simply set your watch to atomic time, take a photo of the dial within the app, and record the difference. Analyze daily deviations over 15 days to assess your watch's performance.

**Highlights:** Track daily watch accuracy, Compare against atomic time, Photo capture for time reading, Altitude recording, Save data in CSV format, Analyze 15-day data trends

**In-app purchases:** none


### iTosh

[App page](https://appshunter.io/ios/app/itosh/id6471843042)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Chronometer free?

Chronometer costs $2.99, with no in-app purchases.

### Is iTosh free?

iTosh is free to download, with no in-app purchases.

### Do Chronometer or iTosh have ads?

Neither Chronometer nor iTosh shows ads.

### Which is updated more often, Chronometer or iTosh?

Chronometer ships an update every 5 months, and iTosh every 3 weeks. Most recently, Chronometer was updated on October 8, 2026 and iTosh on October 10, 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.*