# Twelve O'clock vs Clockwork

Twelve O'clock and Clockwork both sit at 4.4 stars, but that hides the real split: 91% of Twelve O'clock's written reviews are positive against 43% of Clockwork's. Twelve O'clock also leads on device support (3 vs 1) and ratings volume (82 vs 24). On price, rating, update cadence and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 4.4 for Twelve O'clock against 4.4 for Clockwork. Both are backed by a comparable volume of ratings — 82 and 24 respectively. Written reviews are what separate them: 91% of Twelve O'clock's written reviews are positive against 43% of Clockwork's.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on August 10, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | Twelve O'clock | Clockwork |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (82 ratings)](https://appshunter.io/ios/app/twelve-oclock/id1570977980/reviews)** | [4.4 (24 ratings)](https://appshunter.io/ios/app/clockwork-watch-app/id1612061033/reviews) |
| Number of ratings | **82** | 24 |
| Positive reviews | **91.1% of reviews** | 42.9% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 45 MB | 242 MB |
| Requires iOS | **14.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Hieu Pham](https://appshunter.io/developer/1570977982) | [Appfred AS](https://appshunter.io/developer/1612061035) |

## What reviewers say

### Twelve O'clock

[App page](https://appshunter.io/ios/app/twelve-oclock/id1570977980)

Easily track the accuracy of your mechanical watches over time. Manually log checkpoints to calculate seconds per day and visualize performance with charts. Manage your watch collection with photos and learn more about horology.

**Highlights:** Manage watch collection, Add/edit/remove watches, Include watch photos, Track watch accuracy, Calculate seconds per day, View accuracy charts, Horology content

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Twelve Plus | $1.99 | one-time |

**What reviewers like**

- 👍 Intuitive and simple user interface
- 💰 Excellent value at $0.99 one-time purchase
- 🎯 Accurate watch accuracy tracking
- ⏱️ Flexible checkpoint timing (0, 15, 30, 45 seconds)
- 📊 Clear data visualization and graphs

**What reviewers complain about**

- 🐛 App freezes and crashes frequently
- 💾 Data loss after updates
- ⚠️ Free version severely limited (5 checkpoints only)
- 🔔 Silent mode prevents beeping sounds
- 🎯 Requires learning curve for some users

**Reported bugs**

- App freezes at loading requiring phone restart
- Data deletion after app updates
- Data loss on app crash
- Graph display glitches after checkpoints
- Photo checkpoint feature returns 'old photo not supported' error

**Requested features**

- iCloud/cloud synchronization across devices
- Notifications or reminders for checkpoints
- Current time button on checkpoint screen
- Larger buttons for 15/30/45 second marks
- Power reserve tracking


### 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 |


## Frequently asked questions

### Is Twelve O'clock free?

Twelve O'clock is free to download, with in-app purchases available.

### Is Clockwork free?

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

### Which has better reviews, Twelve O'clock or Clockwork?

Twelve O'clock is rated higher. Twelve O'clock averages 4.4 out of 5 from 82 ratings, while Clockwork averages 4.4 from 24 ratings.

### Do Twelve O'clock or Clockwork have ads?

Neither Twelve O'clock nor Clockwork shows ads.

### Which is updated more often, Twelve O'clock or Clockwork?

Twelve O'clock ships an update every 3 weeks, and Clockwork every 3 weeks. Most recently, Twelve O'clock was updated on August 10, 2026 and Clockwork on September 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.*