# WatchWave - Radio Signal Sync — user reviews

> 79 indexed App Store user reviews of WatchWave by 瑜骏 朱, rated 4.80/5 from 57 ratings.

- Source: https://appshunter.io/ios/app/watchwave-radio-signal-sync/id1504218030/reviews
- App overview in markdown: https://appshunter.io/ios/app/watchwave-radio-signal-sync/id1504218030.md
- Rating breakdown: 5★ 53 · 4★ 1 · 3★ 0 · 2★ 0 · 1★ 3

## Newest reviews (13 of 79)

### 4/5 — 使えてます

*2026-05-03*

オートでJJY60が設定されてるのですが変更は出来ないのでしょうか？可能であれば対応お願い致します。

### 5/5 — Works 👍

*2025-05-31, version 1.1.1*

Worked perfectly after a few mins with my g-shock

### 5/5 — Effective Radiowave sync

*2025-05-14*

Awesome!

### 5/5 — WatchWave review

*2025-04-12, version 1.1.1*

Worked perfect! Thanks again!

### 5/5 — 用airpods air 2搞定

*2025-03-23, version 1.1.1*

设置里将人耳检测关了，然后全放表盘上音量拉满，5分钟内就对波成功。手表型号西铁城蓝天使一代。

### 4/5 — バッチリ

*2025-01-21*

大阪府で使用しました。
JJY40でバッチリ時刻が合いました。

### 5/5 — Japan radio watch

*2024-12-27, version 1.1.1*

So I bought a radio watch directly from Japan on eBay. Other apps would not work for the sync process.  This app worked flawlessly. I can now sync my watch to my current time in Ontario Canada.  Pro tip… Make sure you click on the “wave turbo” icon.

### 5/5 — Super handy!

*2024-09-30, version 1.1.1*

Besides looking good, this app does exactly what it set out to do.  It’s lets you set “atomic clocks”, the radio controlled and radio synced clocks that should auto set themselves, but appear to never be able to get a signal.   

On the phone, I struggled to get it to work, though others online had better experiences with earphones/headphones (big magnets, the cable acting as signal spreader) and some say even an AirPod can work.   

I had better experiences with an iPad, but mostly because the speaker is larger.  You may also find placing the clock on a poorly shielded Bluetooth speaker might work well also.  Turning volume up all the way is needed: I think you need to hear the clicks to make sure enough signal is generated. The sound itself doesn’t really matter, it just implies that a strong enough current is being sent to move the magnet at the right frequency and can get to the antenna of the clock.

It takes a while.  Be willing to wait 7-10 minutes get the sync to complete.  

The app supports almost every major radio signal format for time that my various watches and clocks expect, including US, Germany, and Japan.  

Very nice app!  Rare to have one just do what it says it will do.

### 5/5 — It works well, but high cpu usage and draining battery

*2024-09-30, version 1.1.1*

It works well to sync my citizen and Casio multi band watches. But the app consumed high cpu and draining the battery. iPhone became hot during signal generation, just like playing a game. It will be perfect if battery and cpu consumption can be lower.

### 5/5 — Famously

*2024-09-14, version 1.1.1*

Rt

### 5/5 — Workaround for WWVB weak signal

*2024-08-31, version 1.1.1*

NIST station WWVB lost half its antennas in a storm and we lost coverage in Southern United States. This app works! I get it. 20 KHz harmonics coupled from speaker voice coil. Very clever. One small detail is that the clock time is off about 1.5 seconds slow. I work in communications and it would be really great if the program creators would add an offset function to dial the time in exactly. Just give us a setting where we could insert a number, say -1400 ms, to offset the transmitter digital code. Thank you for writing this helpful app. Recommended.

### 5/5 — JJY シミュレータの代わりに

*2024-07-18*

JJYシミュレータで電波時計合わせてたのに、ios17になってからなのか使えなくなって困っていました。
ダメ元で試したらこちらのアプリで時間合わせできました。めっちゃ時間かかってあきらめそうになるくらい待ちましたけど。
使えたので100円なら安いもんですね。

### 5/5 — Use Headphones

*2024-06-25, version 1.1.1*

Would not sync using an iPhone 15 speaker, but using Apple AirPod Pro headphones it worked great. Took a few tries but now my Casio watch is set. Tuned off ear detection in Settings so the Airpods would still make noise while sitting on top of the watch. Very happy!

## Most critical reviews (10 lowest-rated)

### 1/5 — Doesn’t work

*2026-03-17, version 1.1.1*

This app does NOT work with iPhone + Casio 5610. Waste of my time.

### 1/5 — Far from good

*2025-12-10, version 1.1.1*

Even if it costs just 1€, it’s not worth the money so far. Tried multiple times changing point of application with no success. Help pages are empty websites and most of the instructions are written in Chinese or Japanese language, would like to work it out but don’t know how

### 1/5 — 音が出ない！

*2025-07-06*

iPad Air、iPad mini5でJJY電波時計　時刻合わせ　表電波　擬似送信アプリが使えなくなってインストールしてみましたが音量最大にしてもイヤホンにしても音が出ないし、受信ゲージで受信もしないのでヘルプを使って見ると課金メニューで使えない！

### 1/5 — Non funziona

*2025-02-02, version 1.1.1*

Provato diverse opzioni più volte ma non riesce a inviare il segnale al mio Citizen

### 1/5 — 時刻合いません。お金返して下さい。

*2025-01-02*

最初合ってたけど、30秒〜1分違って時刻補正完了が出るように　なりました時刻補正にならないので無料なら諦めますが、有料ではあり得ません。早急に対策願います

### 1/5 — Doesn’t Work

*2024-10-28*

Didn’t work at all with my Citizen Eco Drive Radio Watch

### 1/5 — It does not do Anything.

*2023-08-07, version 1.1.1*

It doesn’t even produce any sound that supposed to help adjusting time. What is the point of having the speaker volume all the way on when there is absolutely no sound that this app produces. Do not waste your money

### 1/5 — 受信しませんでした

*2021-07-28*

残念ながら受信しませんでした

### 1/5 — 受信出来ない

*2020-08-05*

全然受信出来ない。
120円返して欲しい。

### 3/5 — 音が出ません

*2026-07-28*

iOS26.6にアップデートしてから音が出なくなりました。
改善お願いいたします。

## Most praised reviews (10 highest-rated)

### 5/5 — 40で行ける

*2026-07-28*

古い電波時計は40の方で合います

### 5/5 — Works with a loudspeaker

*2026-06-16*

Sync succeeded with an iPhone 6s built-in
speaker. Kudos.

A speaker with higher output is recommended for faster syncs.

### 5/5 — WOW IT WORKS!

*2026-05-08, version 1.1.1*

I recently purchased a citizen radio watch but haven’t managed to get a radio signal in 3 weeks. I live in the north east in a very dense metro so I was trying to plan an opportunity in the mountains to get it some signal. Then i found about about this app on Reddit and it really works! The first couple of times it didn’t cast a strong enough signal from my phone but I set my watch infront of my iPad and it got the signal. Brilliant!

### 5/5 — Ottima

*2026-03-14, version 1.1.1*

Funziona subito con segnale forte

### 5/5 — カシオ腕時計

*2026-03-12*

合わせられた！ありがとう！

### 5/5 — とても便利

*2026-02-26*

有名メーカー時計ならほとんど時間合わせ出来ると思います。SEIKO、CITIZEN、CASIO 等

### 5/5 — 消音モード解除忘れずに

*2026-02-11*

いや、びっくり。何で？って思うほどばっちり！Amazonで20,000円ほどの電波発信機買おうか悩んでたら見つけて使用。先見つけられて助かった！

### 5/5 — Just works !

*2025-12-05, version 1.1.1*

Synced after 5 minutes.

### 5/5 — 全ての時計に受信ができた

*2025-11-07*

腕時計２つに置き時計や壁掛け時計まで電波時計は全てこのアプリで同期させることができました。　無料のものがあったけど使い物にならず有料のこのアプリを課金しましたが150円で安いしポチッて正解でした。

### 5/5 — Good

*2025-08-02, version 1.1.1*

Work perfectly on my citizen jdm watch pmd56

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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 2026-09-08.*