# Clockwork vs Ratekeeper

The clearest difference is review sentiment: Ratekeeper at 100% against Clockwork's 43%. Ratekeeper also leads on rating (5.0 vs 4.4) and update cadence (every 3 days vs every 3 weeks). Clockwork's advantage is ratings volume (24 vs 2) and iOS requirement (16.4 vs 26.5). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Clockwork sells 1 one-off in-app purchase and Ratekeeper sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Ratekeeper holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Clockwork has 24 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 43% of Clockwork's written reviews are positive against 100% of Ratekeeper's.

Clockwork ships an update every 3 weeks, Ratekeeper every 3 days. The most recent releases landed on October 11, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Clockwork | Ratekeeper |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (24 ratings)](https://appshunter.io/ios/app/clockwork-watch-app/id1612061033/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/ratekeeper-watch-accuracy/id6792385277/reviews)** |
| Number of ratings | **24** | 2 |
| Positive reviews | 42.9% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 3 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 242 MB | 7 MB |
| Requires iOS | **16.4** | 26.5 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Appfred AS](https://appshunter.io/developer/1612061035) | [Slow Sunday Software LLC](https://appshunter.io/developer/6786411203) |

## 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 |


### Ratekeeper

[App page](https://appshunter.io/ios/app/ratekeeper-watch-accuracy/id6792385277)

Measure the daily accuracy of your mechanical watch without specialized equipment. Simply tap when your watch's second hand aligns with true time, and the app calculates its rate. Track historical data, compare against specifications, and analyze performance by resting position.

**Highlights:** Measures watch rate in seconds per day, Historical data tracking and charting, Comparison against specified accuracy bands, Analysis of rate by resting position, Standalone true-time reference clock, Export readings to CSV

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock the entire app | $4.99 | one-time |


## Frequently asked questions

### Is Clockwork free?

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

### Is Ratekeeper free?

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

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

Ratekeeper is rated higher. Clockwork averages 4.4 out of 5 from 24 ratings, while Ratekeeper averages 5.0 from 2 ratings.

### Do Clockwork or Ratekeeper have ads?

Neither Clockwork nor Ratekeeper shows ads.

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

Clockwork ships an update every 3 weeks, and Ratekeeper every 3 days. Most recently, Clockwork was updated on October 11, 2026 and Ratekeeper on October 7, 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.*