# ChronoLog vs STOA Maintech

The clearest difference is in-app purchases: STOA Maintech at none against ChronoLog's 2. STOA Maintech also leads on rating (5.0 vs 4.6). ChronoLog's advantage is ratings volume (204 vs 4) and update cadence (every 3 weeks vs every 2 months). On price, ads and device support there is nothing between them.

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

STOA Maintech holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: ChronoLog has 204 ratings behind it against 4, so its average is the more settled of the two.

ChronoLog ships an update every 3 weeks, STOA Maintech every 2 months. The most recent releases landed on October 17, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | ChronoLog | STOA Maintech |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (204 ratings)](https://appshunter.io/ios/app/chronolog-watch-accuracy/id6452083510/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/stoa-maintech/id6742714031/reviews)** |
| Number of ratings | **204** | 4 |
| Positive reviews | 84.8% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | Paid | **Free** |
| Size | 49 MB | 35 MB |
| Requires iOS | **13.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [tyler wood](https://appshunter.io/developer/1698739777) | [Stoa Technologies](https://appshunter.io/developer/1799570324) |

## 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 |


### STOA Maintech

[App page](https://appshunter.io/ios/app/stoa-maintech/id6742714031)

Report maintenance issues quickly by submitting a photo and description. Service technicians are dispatched to your location for repairs.

**Highlights:** Submit maintenance requests, Attach photos to requests, Brief description of issue, Service technician dispatch, On-site repair services

**In-app purchases:** none


## Frequently asked questions

### Is ChronoLog free?

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

### Is STOA Maintech free?

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

### Which has better reviews, ChronoLog or STOA Maintech?

STOA Maintech is rated higher. ChronoLog averages 4.6 out of 5 from 204 ratings, while STOA Maintech averages 5.0 from 4 ratings.

### Do ChronoLog or STOA Maintech have ads?

Neither ChronoLog nor STOA Maintech shows ads.

### Which is updated more often, ChronoLog or STOA Maintech?

ChronoLog ships an update every 3 weeks, and STOA Maintech every 2 months. Most recently, ChronoLog was updated on October 17, 2026 and STOA Maintech on October 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.*