# Radio Wave Sync vs Atomic Sync

The clearest difference is rating: Radio Wave Sync at 4.5 against Atomic Sync's 2.5. Radio Wave Sync also leads on ratings volume (1.1K vs 2) and iOS requirement (13.0 vs 15.0). Atomic Sync's advantage is in-app purchases (none vs 1) and update cadence (fortnightly vs every 2 months). On price, ads and device support there is nothing between them.

Both are free to download. Radio Wave Sync sells 1 one-off in-app purchase. Atomic Sync asks for nothing beyond the download.

Radio Wave Sync holds the better App Store score, 4.5 against 2.5. That said, the two scores are not equally well evidenced: Radio Wave Sync has 1.1K ratings behind it against 2, so its average is the more settled of the two.

Radio Wave Sync ships an update every 2 months, Atomic Sync fortnightly. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Radio Wave Sync | Atomic Sync |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (1.1K ratings)](https://appshunter.io/ios/app/radio-wave-sync/id1484233572/reviews)** | [2.5 (2 ratings)](https://appshunter.io/ios/app/atomic-sync-radio-watch-time/id6761634713/reviews) |
| Number of ratings | **1.1K** | 2 |
| Positive reviews | 61.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 2 months | **Fortnightly** |
| Monetization | Free with in-app purchases | — |
| Size | 15 MB | 27 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) | [Serhii Sereda](https://appshunter.io/developer/1887133214) |

## 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


### Atomic Sync

[App page](https://appshunter.io/ios/app/atomic-sync-radio-watch-time/id6761634713)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Radio Wave Sync free?

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

### Is Atomic Sync free?

Atomic Sync is free to download, with no in-app purchases.

### Which has better reviews, Radio Wave Sync or Atomic Sync?

Radio Wave Sync is rated higher. Radio Wave Sync averages 4.5 out of 5 from 1.1K ratings, while Atomic Sync averages 2.5 from 2 ratings.

### Do Radio Wave Sync or Atomic Sync have ads?

Both Radio Wave Sync and Atomic Sync show ads.

### Which is updated more often, Radio Wave Sync or Atomic Sync?

Radio Wave Sync ships an update every 2 months, and Atomic Sync fortnightly. Most recently, Radio Wave Sync was updated on October 25, 2026 and Atomic Sync on October 24, 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.*