# Radio Wave Sync vs Twelve O'clock

The clearest difference is ads: Twelve O'clock at none against Radio Wave Sync's shown. Twelve O'clock also leads on review sentiment (91% vs 61%) and update cadence (every 3 weeks vs every 2 months). Radio Wave Sync's advantage is ratings volume (1.1K vs 83) and iOS requirement (13.0 vs 15.0). On price, rating, in-app purchases and monetization model there is nothing between them.

Both are free to download. Radio Wave Sync sells 1 one-off in-app purchase and Twelve O'clock 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 — 4.5 for Radio Wave Sync against 4.4 for Twelve O'clock. That said, the two scores are not equally well evidenced: Radio Wave Sync has 1.1K ratings behind it against 83, so its average is the more settled of the two. Written reviews are what separate them: 61% of Radio Wave Sync's written reviews are positive against 91% of Twelve O'clock's.

Radio Wave Sync ships an update every 2 months, Twelve O'clock every 3 weeks. The most recent releases landed on October 20, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Radio Wave Sync | Twelve O'clock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (1.1K ratings)](https://appshunter.io/ios/app/radio-wave-sync/id1484233572/reviews)** | [4.4 (83 ratings)](https://appshunter.io/ios/app/twelve-oclock/id1570977980/reviews) |
| Number of ratings | **1.1K** | 83 |
| Positive reviews | 61.5% of reviews | **91.1% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 15 MB | 46 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [宁 金](https://appshunter.io/developer/1085058605) | [Hieu Pham](https://appshunter.io/developer/1570977982) |

## What reviewers say

### Radio Wave Sync

[App page](https://appshunter.io/ios/app/radio-wave-sync/id1484233572)

This app helps synchronize radio-controlled watches by simulating time signal waves. It supports various international time signal standards and offers a 'Beast Mode' for faster synchronization. Simply place your watch near your device's speaker and start the process.

**Highlights:** Simulates international time wave signals, Supports China, USA, Japan, Germany, and UK signals, Unique 'Beast Mode' for faster sync, Manual wave receiving mode calibration, Adjustable volume for optimal signal

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Editon | $1.99 | one-time |

**What reviewers like**

- 🚀 Works as intended
- 👍 Easy to use
- 💡 Innovative solution
- 🔒 Reliable sync
- ⏱️ Fast sync time

**What reviewers complain about**

- 🐛 Inconsistent performance
- 💰 Paid version required
- 🔇 Audio issues
- 🤖 Ads in paid version
- 🔁 One-time use only

**Reported bugs**

- No sound output
- Sync failure after initial success
- Incompatibility with certain watch models

**Requested features**

- Time zone offset option
- Compatibility with newer devices
- Improved reliability and consistency


### 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 Radio Wave Sync free?

Radio Wave Sync is free to download, with in-app purchases available.

### Is Twelve O'clock free?

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

### Which has better reviews, Radio Wave Sync or Twelve O'clock?

Radio Wave Sync is rated higher. Radio Wave Sync averages 4.5 out of 5 from 1.1K ratings, while Twelve O'clock averages 4.4 from 83 ratings.

### Do Radio Wave Sync or Twelve O'clock have ads?

Radio Wave Sync shows ads; Twelve O'clock does not.

### Which is updated more often, Radio Wave Sync or Twelve O'clock?

Radio Wave Sync ships an update every 2 months, and Twelve O'clock every 3 weeks. Most recently, Radio Wave Sync was updated on October 20, 2026 and Twelve O'clock on October 21, 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.*