# Clockwork vs iHorology

The clearest difference is in-app purchases: iHorology at none against Clockwork's 1. iHorology also leads on device support (3 vs 1) and iOS requirement (12.0 vs 16.4). Clockwork's advantage is update cadence (every 3 weeks vs every 2 months) and ratings volume (24 vs 4). On price, rating, review sentiment and ads there is nothing between them.

Both are free to download. Clockwork sells 1 one-off in-app purchase. iHorology asks for nothing beyond the download.

Clockwork holds the better App Store score, 4.4 against 4.3. That said, the two scores are not equally well evidenced: Clockwork has 24 ratings behind it against 4, so its average is the more settled of the two. Written reviews complicate that: 43% of Clockwork's written reviews are positive against 50% of iHorology's, so the app with the better star average is not the one people write more warmly about.

Clockwork ships an update every 3 weeks, iHorology every 2 months. The most recent releases landed on October 19, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Clockwork | iHorology |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (24 ratings)](https://appshunter.io/ios/app/clockwork-watch-app/id1612061033/reviews)** | [4.3 (4 ratings)](https://appshunter.io/ios/app/ihorology/id1633242134/reviews) |
| Number of ratings | **24** | 4 |
| Positive reviews | 42.9% of reviews | **50.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 242 MB | 35 MB |
| Requires iOS | 16.4 | **12.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Appfred AS](https://appshunter.io/developer/1612061035) | [Kaizen Writer](https://appshunter.io/developer/1633242376) |

## What reviewers say

### Clockwork

[App page](https://appshunter.io/ios/app/clockwork-watch-app/id1612061033)

This app allows you to measure the accuracy of your watches using your phone's camera. It compares an image of your watch to an atomic clock to calculate its timekeeping offset. Track accuracy over time with graphs and store detailed watch information.

**Highlights:** Measure accuracy using images, Atomic clock synchronization, Accuracy over time graphs, Store detailed watch information, Dark mode support, Digital and analog atomic clock

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

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


### iHorology

[App page](https://appshunter.io/ios/app/ihorology/id1633242134)

This app simulates the functions of a mechanical watch on your phone or tablet. It offers a wide range of features found in real-world timepieces, including chronographs, calendars, and chiming functions. Experience the complexity of mechanical watches with customizable options.

**Highlights:** Chronograph functions (split, flyback, monopusher), Perpetual and annual calendars, Minute repeaters and chiming features, Customizable bezel options, GMT, alarm, and moonphase complications, Power reserve simulation

**In-app purchases:** none


## Frequently asked questions

### Is Clockwork free?

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

### Is iHorology free?

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

### Which has better reviews, Clockwork or iHorology?

Clockwork is rated higher. Clockwork averages 4.4 out of 5 from 24 ratings, while iHorology averages 4.3 from 4 ratings.

### Do Clockwork or iHorology have ads?

Neither Clockwork nor iHorology shows ads.

### Which is updated more often, Clockwork or iHorology?

Clockwork ships an update every 3 weeks, and iHorology every 2 months. Most recently, Clockwork was updated on October 19, 2026 and iHorology on October 15, 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.*