# Atomic Clock PRO vs Radio Wave Sync

The clearest difference is ratings volume: Atomic Clock PRO at 10K against Radio Wave Sync's 1.1K. Atomic Clock PRO also leads on review sentiment (73% vs 61%). Radio Wave Sync's advantage is iOS requirement (13.0 vs 15.6). On price, rating, update cadence and ads there is nothing between them.

Both are free to download. Atomic Clock PRO sells 2 in-app purchases, starting at $1.99 per month and Radio Wave Sync sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Atomic Clock PRO holds the better App Store score, 4.7 against 4.5. That said, the two scores are not equally well evidenced: Atomic Clock PRO has 10K ratings behind it against 1.1K, so its average is the more settled of the two. Written reviews point the same way: 73% of Atomic Clock PRO's written reviews are positive against 61% of Radio Wave Sync's.

Atomic Clock PRO ships an update every 4 months, Radio Wave Sync every 2 months. The most recent releases landed on November 14, 2026 and November 13, 2026 respectively.

## The numbers

| Metric | Atomic Clock PRO | Radio Wave Sync |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (10K ratings)](https://appshunter.io/ios/app/atomic-clock-pro/id899090224/reviews)** | [4.5 (1.1K ratings)](https://appshunter.io/ios/app/radio-wave-sync/id1484233572/reviews) |
| Number of ratings | **10K** | 1.1K |
| Positive reviews | **72.9% of reviews** | 61.4% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 6 MB | 15 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Brachmann Online Marketing GmbH & Co. KG](https://appshunter.io/developer/682848918) | [宁 金](https://appshunter.io/developer/1085058605) |

## What reviewers say

### Atomic Clock PRO

[App page](https://appshunter.io/ios/app/atomic-clock-pro/id899090224)

This app provides highly accurate time by syncing with official atomic clock servers. Customize your display with digital or analog views, personal backgrounds, and adjustable sizes. It's perfect for precise timekeeping, travel, or as a personalized desk clock.

**Highlights:** Atomic clock time synchronization, Digital and analog display options, Customizable backgrounds, Adjustable clock size, Automatic time zone recognition, Screen always on option

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $1.99 | per month |
| Remove Ads | $5.99 | one-time |

**What reviewers like**

- ⭐ Accurate time display
- 📟 Useful for timing events
- 🕰️ Helpful for setting other clocks
- 🔍 Large, easy-to-read clock face

**What reviewers complain about**

- 💸 Subscription model for ad-free version
- 📢 Excessive advertisements
- 🔍 Small font for seconds display
- 🔀 Difficulty in displaying both analog and digital clocks simultaneously

**Reported bugs**

- Second hand occasionally runs in reverse
- Digital clock display cuts off on some devices
- Inconsistent behavior when switching between clock types

**Requested features**

- Customizable clock face options
- Ability to set widget on home screen
- Sync with system clock to automatically update time


### 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


## Frequently asked questions

### Is Atomic Clock PRO free?

Atomic Clock PRO is free to download, with in-app purchases available.

### Is Radio Wave Sync free?

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

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

Atomic Clock PRO is rated higher. Atomic Clock PRO averages 4.7 out of 5 from 10K ratings, while Radio Wave Sync averages 4.5 from 1.1K ratings.

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

Both Atomic Clock PRO and Radio Wave Sync show ads.

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

Atomic Clock PRO ships an update every 4 months, and Radio Wave Sync every 2 months. Most recently, Atomic Clock PRO was updated on November 14, 2026 and Radio Wave Sync on November 13, 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.*