# Twelve O'clock vs Watch Accuracy Checker

The clearest difference is rating: Twelve O'clock at 4.4 against Watch Accuracy Checker's 1.0. Twelve O'clock also leads on review sentiment (91% vs 67%) and ratings volume (83 vs 1). Watch Accuracy Checker's advantage is in-app purchases (none vs 1). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Twelve O'clock sells 1 one-off in-app purchase. Watch Accuracy Checker asks for nothing beyond the download.

Twelve O'clock holds the better App Store score, 4.4 against 1.0. That said, the two scores are not equally well evidenced: Twelve O'clock has 83 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 91% of Twelve O'clock's written reviews are positive against 67% of Watch Accuracy Checker's.

Twelve O'clock ships an update every 3 weeks, Watch Accuracy Checker monthly. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Twelve O'clock | Watch Accuracy Checker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (83 ratings)](https://appshunter.io/ios/app/twelve-oclock/id1570977980/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/watch-accuracy-checker/id6478476307/reviews) |
| Number of ratings | **83** | 1 |
| Positive reviews | **91.1% of reviews** | 66.7% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Monthly |
| Monetization | Free with in-app purchases | **Free** |
| Size | 46 MB | 14 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hieu Pham](https://appshunter.io/developer/1570977982) | [Cogniter Technologies Pvt Ltd](https://appshunter.io/developer/478571271) |

## 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


### Watch Accuracy Checker

[App page](https://appshunter.io/ios/app/watch-accuracy-checker/id6478476307)

Measure and track the timekeeping accuracy of your mechanical, automatic, or quartz wristwatches. The app provides a reference timer and allows you to capture screenshots for comparison, maintaining a history of your tracking sessions.

**Highlights:** Add and edit watch details, Track accuracy against global time, Foreground and background timer, Multiple watch tracking, Screenshot capture for comparison, Tracking history with timestamps, Tracker running notifications

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

**In-app purchases:** none


## Frequently asked questions

### Is Twelve O'clock free?

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

### Is Watch Accuracy Checker free?

Watch Accuracy Checker is free to download, with no in-app purchases.

### Which has better reviews, Twelve O'clock or Watch Accuracy Checker?

Twelve O'clock is rated higher. Twelve O'clock averages 4.4 out of 5 from 83 ratings, while Watch Accuracy Checker averages 1.0 from 1 ratings.

### Do Twelve O'clock or Watch Accuracy Checker have ads?

Neither Twelve O'clock nor Watch Accuracy Checker shows ads.

### Which is updated more often, Twelve O'clock or Watch Accuracy Checker?

Twelve O'clock ships an update every 3 weeks, and Watch Accuracy Checker monthly. Most recently, Twelve O'clock was updated on November 3, 2026 and Watch Accuracy Checker on October 30, 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.*