# Radio Wave Sync — Sync Radio Controlled Watch

> Simulates radio time signals to synchronize radio-controlled watches. (iPhone/iPad app by 宁 金.)

- Source: https://appshunter.io/ios/app/radio-wave-sync/id1484233572 (this page in markdown: same URL + `.md`)
- Developer: [宁 金](https://appshunter.io/developer/1085058605)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Rating: 4.50/5 from 1,049 App Store ratings · 315 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.0 · 15 MB
- Languages: American English, Chinese (Traditional, Taiwan), Chinese (Simplified, China)
- Released: 2019-10-29
- Data updated: 2026-08-28
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/radio-wave-sync/id1484233572/reviews.md

## What is Radio Wave Sync?

I have a Casio G-Series radio watch, but it is always unable to receive radio waves from time signal station, so I started to write an application to solve this problem.

After some research, I finally wrote this application, which can perfectly simulate the timing signal and happily calibrate the time.

Usage method:
1. Adjust the volume of iPhone / iPad to the maximum.
2. Switch the radio controlled watch / clock to manual wave receiving mode.
3. Click the "start" button.
4. Place the watch / clock near the iPhone / iPad speakers.
5. The synchronization process generally takes 3-10 minutes, please wait patiently.

Matters needing attention:
1. Please try to use the software in a quiet environment to avoid signal interference.
2. The volume of the mobile phone must be adjusted to the maximum. It's too small and the effect is not good.

Characteristic:
1. Supports simulation of all types of Time Wave Signal:
* China          BPC
* USA            WWVB
* Japan         JJY40 / JJY60
* Germany   DCF77
* British        MSF
2. The unique "Beast Mode" provides higher frequency simulation signals and faster sync.

Contact information:
Please contact me if you have any use questions
*QQ: 3364918353
*Email: 3364918353@qq.com

## Key features

- 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

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

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


## What do users think of Radio Wave Sync?

Overall sentiment: neutral

**Pros**

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

**Cons**

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

**Commonly reported bugs**

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

**Most requested features**

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

## Recent user reviews (10 of 315)

All indexed reviews: https://appshunter.io/ios/app/radio-wave-sync/id1484233572/reviews.md

### 5/5 — This App WORKS

*2026-07-30, version 1.0.14*

This app is super simple, *WELL* worth the money, and effectively synchronizes with my Casio, Iron Man, wave, scepter, solar watch. Pro edition is a must, as it works most effectively in BEAST mode

### 2/5 — Even with paid version, doesn’t work

*2026-07-10, version 1.0.14*

Unfortunately no matter how I position the phone, or use of the “beast mode,” I cannot get a successful sync with my brand new Citizen tsuki yomi watch. I only give it two stars because it seems like some people can get it to work - but it’s junk for me.

### 1/5 — Never worked for me but other  app did.

*2026-06-13, version 1.0.14*

Tried it every way possible. iPhone speaker, Bluetooth speaker, wired speaker, headphones every possible position. Wasted well over an hour. It never worked.  
Maybe this works if you pay to unlock their beast mode but their free version will not work for my watch.  

I tried a different paid App with initials C.W. and it worked first try with Casio 5161 moduled watch 12 o’clock position against iPhone 16 speaker.

### 5/5 — Работает!

*2026-06-06*

Спасибо за приложение всё работает!

### 1/5 — No sound

*2026-05-27, version 1.0.14*

It worked until the moment I paid for it. Now it doesn't work because it makes no sound. Feedback link in App Store leads nowhere.

### 1/5 — Doesn’t Work.

*2026-05-09, version 1.0.14*

Nothing I try works. The Casio simply will not sync. I put it in a dead silent room and full volume with the phone speaker 1mm from the watch.  ERR. Always ERR.

### 4/5 — Great app! Cannot restore purchase.

*2026-05-07, version 1.0.14*

Really cool tool, I use it with my Casio, however I’m a little bummed I can’t turn on beast mode because I unable to restore my purchase.

### 5/5 — It works

*2026-04-28, version 1.0.14*

Wasn’t working at first, but tried again with wifi off on iPhone 14 Pro and synced successfully after a couple minutes. You need to hear clicking noises from the app, if you hear nothing it won’t work.

I have a G Shock 5000u and 5610u, when I don’t wear one for a week it goes in power saving mode and the time is off. Handy to sync the watch manually, I recommend the app.

### 1/5 — Purchased VIP, App did not work.

*2026-04-28, version 1.0.14*

No sound from app, no settings to attempt fix, does not work.

### 5/5 — you fabulous

*2026-04-20*

thank you

## Frequently asked questions about Radio Wave Sync

### What does Radio Wave Sync do?

Radio Wave Sync is designed to help you synchronize radio-controlled watches, especially those that have trouble receiving time signals. It works by simulating the necessary time signal waves that your watch needs to calibrate itself.

### How do I use Radio Wave Sync to sync my watch?

To use the app, first set your iPhone/iPad volume to maximum. Then, switch your radio-controlled watch to manual wave receiving mode. Place your watch near the device's speakers and tap the 'start' button. The synchronization process typically takes between 3 to 10 minutes.

### What time signal standards does the app support?

The application supports simulation of several international time wave signals, including China (BPC), USA (WWVB), Japan (JJY40/JJY60), Germany (DCF77), and the British (MSF) signals. It also features a 'Beast Mode' for higher frequency simulation and faster syncing.

### Is this app free to use?

The application is free to download and use, but it does offer in-app purchases. It also displays ads. For the best results, ensure your device's volume is at its maximum and try to use the software in a quiet environment to minimize signal interference.

### What devices is Radio Wave Sync compatible with?

The application is designed to work with iPhones and iPads. Users are advised to ensure their device's volume is set to the maximum for optimal performance when simulating time signals for their radio-controlled watches.

## Version history (last 5 releases)

### 1.0.14 — 2023-02-28

1. Fix the problem that analog audio has no sound in some cases
2. Adapt to iOS 16

### 1.0.13 — 2022-04-27

Fix occasional crash in dcf77 mode

### 1.0.12 — 2021-11-10

1.Fix the occasional timing failure in dcf77 mode

### 1.0.11 — 2021-05-31

1. Fix the problem of time sync failure in jjy40 & jjy60 mode in some cases.

### 1.0.10 — 2021-02-09

1. Fix the problem of time sync failure in dcf77 mode in some cases.

## Apps similar to Radio Wave Sync

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Radio App - Simple Radio Tuner](https://appshunter.io/ios/app/radio-app-simple-radio-tuner/id1503113003) | 4.3 (13,176) | Free | Utilities |
| [Alarm Clock - Wake up Music](https://appshunter.io/ios/app/alarm-clock-wake-up-music/id406141511) | 4.6 (35,639) | Free | Utilities |
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| [Timegrapher - watch accuracy](https://appshunter.io/ios/app/timegrapher-watch-accuracy/id6450460771) | 2.8 (44) | Free | Utilities |
| [Twelve O'clock](https://appshunter.io/ios/app/twelve-oclock/id1570977980) | 4.4 (82) | Free | Utilities |
| [G-SHOCK Connected](https://appshunter.io/ios/app/g-shock-connected/id1179983841) | 4.8 (13,175) | Free | Utilities |

## More apps by 宁 金

- [GIF Maker - Videos To GIF](https://appshunter.io/ios/app/gif-maker-videos-to-gif/id1474040867)
- [CNC Lathe calculator](https://appshunter.io/ios/app/cnc-lathe-calculator/id1485500283)

All apps by 宁 金: https://appshunter.io/developer/1085058605

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-28.*