# ChronoLog vs TrueOffset

The clearest difference is in-app purchases: TrueOffset at none against ChronoLog's 2. ChronoLog's advantage is iOS requirement (13.0 vs 17.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. ChronoLog sells 2 one-off in-app purchases. TrueOffset asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 5, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | ChronoLog | TrueOffset |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (204 ratings)](https://appshunter.io/ios/app/chronolog-watch-accuracy/id6452083510/reviews)** | — |
| Number of ratings | **204** | — |
| Positive reviews | 84.8% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | Paid | — |
| Size | 49 MB | 2 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple TV |
| Age rating | 4+ | 4+ |
| Developer | [tyler wood](https://appshunter.io/developer/1698739777) | [Richard Bollar](https://appshunter.io/developer/1864304955) |

## What reviewers say

### ChronoLog

[App page](https://appshunter.io/ios/app/chronolog-watch-accuracy/id6452083510)

This app provides professional-grade tools to track the accuracy of mechanical watches. It offers audio timegraphing, photo offset measurement, and tap timing, along with detailed analytics and atomic time synchronization for collectors and enthusiasts.

**Highlights:** Audio timegrapher for rate, beat error, and amplitude, Photo offset measurement against atomic time, Tap timing for quick offset logging, Track accuracy trends over time, Atomic time synchronization, Detailed performance graphs and analytics, Manage and organize watch collection

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $5.99 | one-time |
| Premium | $6.99 | one-time |


### TrueOffset

[App page](https://appshunter.io/ios/app/trueoffset/id6757518499)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ChronoLog free?

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

### Is TrueOffset free?

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

### Do ChronoLog or TrueOffset have ads?

Neither ChronoLog nor TrueOffset shows ads.

### Which is updated more often, ChronoLog or TrueOffset?

ChronoLog ships an update every 3 weeks, and TrueOffset every 3 weeks. Most recently, ChronoLog was updated on October 5, 2026 and TrueOffset on September 20, 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.*