# Clockwork vs Phono Calibre

The clearest difference is price: Clockwork at Free against Phono Calibre's $2.99. Clockwork also leads on iOS requirement (16.4 vs 18.6). Phono Calibre's advantage is in-app purchases (none vs 1). On ads and device support there is nothing between them.

Clockwork is free to download; Phono Calibre costs $2.99 up front. Clockwork sells 1 one-off in-app purchase. Phono Calibre asks for nothing beyond the download.

## The numbers

| Metric | Clockwork | Phono Calibre |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | **[4.4 (24 ratings)](https://appshunter.io/ios/app/clockwork-watch-app/id1612061033/reviews)** | — |
| Number of ratings | **24** | — |
| Positive reviews | 45.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | — |
| Monetization | Free with in-app purchases | — |
| Size | 242 MB | 9 MB |
| Requires iOS | **16.4** | 18.6 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Appfred AS](https://appshunter.io/developer/1612061035) | [MaaDoTaa](https://appshunter.io/developer/488542017) |

## 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 |


### Phono Calibre

[App page](https://appshunter.io/ios/app/phono-calibre-set-up-utility/id6783587444)

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

**In-app purchases:** none


## Frequently asked questions

### Is Clockwork free?

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

### Is Phono Calibre free?

Phono Calibre costs $2.99, with no in-app purchases.

### Do Clockwork or Phono Calibre have ads?

Neither Clockwork nor Phono Calibre shows ads.

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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.*