# Watch Tuner vs Twelve O'clock

The clearest difference is price: Twelve O'clock at Free against Watch Tuner's $0.99. Twelve O'clock also leads on rating (4.4 vs 3.8) and review sentiment (91% vs 70%). Watch Tuner's advantage is in-app purchases (none vs 1). On ads, device support and iOS requirement there is nothing between them.

Twelve O'clock is free to download; Watch Tuner costs $0.99 up front. Twelve O'clock sells 1 one-off in-app purchase. Watch Tuner asks for nothing beyond the download.

Twelve O'clock holds the better App Store score, 4.4 against 3.8. That said, the two scores are not equally well evidenced: Twelve O'clock has 83 ratings behind it against 6, so its average is the more settled of the two. Written reviews point the same way: 70% of Watch Tuner's written reviews are positive against 91% of Twelve O'clock's.

Watch Tuner ships an update every 2 months, Twelve O'clock every 3 weeks. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Watch Tuner | Twelve O'clock |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [3.8 (6 ratings)](https://appshunter.io/ios/app/watch-tuner/id959394022/reviews) | **[4.4 (83 ratings)](https://appshunter.io/ios/app/twelve-oclock/id1570977980/reviews)** |
| Number of ratings | 6 | **83** |
| Positive reviews | 69.6% of reviews | **91.1% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 1 MB | 46 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Bartlomiej Swiatek](https://appshunter.io/developer/943509577) | [Hieu Pham](https://appshunter.io/developer/1570977982) |

## What reviewers say

### Watch Tuner

[App page](https://appshunter.io/ios/app/watch-tuner/id959394022)

This application tests mechanical and automatic watches by measuring rate, beat error, and amplitude using your device's microphone. It provides a history of results for tracking watch quality and stability. For best accuracy, use in a quiet environment.

**Highlights:** Measures rate, beat error, and amplitude, Uses device microphone for recording ticks, Provides results history, Supports iPhone and iPod, Quiet environment recommended for accuracy

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

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Watch Tuner free?

Watch Tuner costs $0.99, with no in-app purchases.

### Is Twelve O'clock free?

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

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

Twelve O'clock is rated higher. Watch Tuner averages 3.8 out of 5 from 6 ratings, while Twelve O'clock averages 4.4 from 83 ratings.

### Do Watch Tuner or Twelve O'clock have ads?

Neither Watch Tuner nor Twelve O'clock shows ads.

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

Watch Tuner ships an update every 2 months, and Twelve O'clock every 3 weeks. Most recently, Watch Tuner was updated on November 1, 2026 and Twelve O'clock on November 3, 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.*