# TimeWave: Atomic Watch Sync — Radio-Controlled Clock Signal

> Simulates radio-controlled clock signals for watch synchronization. (iPhone/iPad app by 毅 何.)

- Source: https://appshunter.io/ios/app/timewave-atomic-watch-sync/id6779167516 (this page in markdown: same URL + `.md`)
- Developer: [毅 何](https://appshunter.io/developer/1477138542)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Rating: 4.40/5 from 18 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.0 · 3 MB
- Languages: American English, Arabic, German (Germany), Japanese, Korean, Chinese (Simplified, China), Chinese (Traditional, Taiwan)
- Released: 2026-06-17
- Data updated: 2026-09-09
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/timewave-atomic-watch-sync/id6779167516/reviews.md

## What is TimeWave?

TimeWave is a professional time-signal simulator designed for radio-controlled watches and clocks.

When your watch cannot reliably receive a terrestrial time signal, TimeWave can generate a compatible time code through your iPhone or iPad speaker, wired headphones, or supported Bluetooth audio devices. This helps your watch perform manual reception and synchronize its time wherever you are.

No ads. No account required. No personal data uploaded. Core synchronization features work offline.

SUPPORTED TIME SIGNALS

• BPC — China
• JJY40 / JJY60 — Japan
• WWVB — United States
• MSF — United Kingdom
• DCF77 — Germany

KEY FEATURES

ENVIRONMENT PRE-CHECK

Before transmission begins, TimeWave checks device volume, battery level, ambient noise, and magnetic-field conditions. It then provides practical recommendations to help reduce common synchronization failures.

SMART OUTPUT TUNING

TimeWave adjusts signal parameters for different audio output paths, including the built-in speaker, wired headphones, and supported Bluetooth audio devices, helping maintain a stable transmission.

LOCAL TIME MODE

Designed for imported and overseas watch models. Generate a compatible time signal using your selected local time zone, making it easier to synchronize watches that do not support your local transmitter.

WATCH-SPECIFIC GUIDES

Follow step-by-step guides for popular radio-controlled watches from Casio G-Shock and Multiband 6, Citizen Eco-Drive, Seiko, Junghans, Braun, and more.

Guides may include:

• Manual reception instructions
• Antenna-position diagrams
• Recommended watch placement
• Reception-status indicators
• Troubleshooting suggestions

Actual compatibility depends on the watch model and the time-signal standard it supports.

MULTIPLE PLACEMENT METHODS

View clear diagrams for positioning your watch near an iPhone or iPad speaker, wired headphone cable, or supported audio device.

OUTPUT PROTECTION

TimeWave controls signal amplitude according to the selected output path and provides warnings when device conditions may be unsuitable for transmission.

LIVE SIGNAL VISUALIZATION

Watch the current time code and transmission waveform in real time, with a clear view of progress and remaining time.

SYNC HISTORY

Save synchronization sessions and record whether each attempt succeeded or failed. Review previous attempts to compare stations, placement methods, and device settings.

PRIVATE AND OFFLINE

TimeWave does not require an account and does not upload your personal data. Core time-signal generation and watch guides are available offline.

HOW TO USE

1. Choose a supported time-signal station or enable Local Time Mode.

2. Put your watch into manual reception mode. On some G-Shock models, this may be shown as RC, RX, or GET.

3. Position the watch antenna close to your iPhone or iPad speaker, wired headphone cable, or supported audio device, following the in-app diagram.

4. Increase the volume and keep both the watch and device still.

5. Start transmission and wait approximately 2–10 minutes. Check the reception indicator on your watch to confirm the result.

TIPS FOR BETTER RECEPTION

• Keep the watch and device away from chargers, power adapters, computers, televisions, speakers, and other sources of electromagnetic interference.

• Watch reception depends on the model, antenna direction, volume, output device, placement, and surrounding environment.

• If your imported watch does not support your local transmitter, select a compatible signal standard and use Local Time Mode when needed.

• For the best results, select your watch brand or model in TimeWave and follow the recommended placement guide.

TimeWave is an independent utility and is not affiliated with, endorsed by, or sponsored by any watch manufacturer or time-signal authority. Brand and product names are used only to describe compatibility.

Questions or suggestions?

Contact: [fish2next@gmail.com](mailto:fish2next@gmail.com)

## Key features

- Radio-controlled clock signal simulation
- Support for multiple international time signals
- Environment pre-check and recommendations
- Smart output tuning for various audio paths
- Local time mode for overseas watches
- Watch-specific synchronization guides
- Live signal visualization and sync history

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Lifetime Membership | $1.99 | one-time |


## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/timewave-atomic-watch-sync/id6779167516/reviews.md

### 3/5 — Not a fan of the paywall

*2026-07-28*

I’d rather pay an upfront charge than jump through hoops.

**Developer response:** Thank you for the feedback, and I’m sorry the process felt complicated. A one-time purchase option is available in the app, and I’ll also work on making it easier to find and reducing unnecessary prompts.

### 3/5 — Syncs

*2026-07-17*

Doing this for the syncs

**Developer response:** Thanks for giving the app a try! If you have any trouble syncing, make sure your watch is in manual reception mode (RC/RCV), turn your iPhone volume up, and place the watch’s antenna area—usually around 10 or 12 o’clock—close to the bottom speaker of your iPhone. Also, please select a station that matches your watch’s city or time zone. Feel free to contact me through the app if you need any help.

## Frequently asked questions about TimeWave

### What time signals does TimeWave support?

TimeWave supports several international time signals including BPC (China), JJY40/JJY60 (Japan), WWVB (United States), MSF (United Kingdom), and DCF77 (Germany).

### Can TimeWave work offline?

Yes, the core synchronization features and watch guides in TimeWave work offline. The app also states it does not require an account and does not upload personal data.

### Does TimeWave have ads?

No, TimeWave explicitly states it has no ads. It is a free application.

### What devices is TimeWave compatible with?

TimeWave is available for iPhone, iPad, and iPod devices. It requires iOS 4.0 or later.

### How does TimeWave help with synchronization failures?

Before transmission, TimeWave performs an environment pre-check, assessing device volume, battery level, ambient noise, and magnetic-field conditions. It then offers practical recommendations to mitigate common synchronization issues.

### Can TimeWave synchronize watches that don't support my local transmitter?

Yes, TimeWave features a Local Time Mode designed for imported and overseas watch models. This mode allows you to generate a compatible time signal using your selected local time zone.

### How often is TimeWave updated?

The latest version of TimeWave is 1.4.0, which was last updated on July 15, 2026. This indicates a relatively active update schedule.

### What is the user sentiment for TimeWave?

Based on the provided data, TimeWave has a rating of 4.0 stars from 2 ratings. This suggests a generally positive reception from its current user base.

## Version history (last 5 releases)

### 1.9.0 — 2026-08-23

Improved signal mode selection and synchronization guidance for more reliable radio-controlled watch synchronization.

### 1.8.0 — 2026-08-18

Improved signal playback logic to increase the success rate of syncing radio-controlled watches.

### 1.7.0 — 2026-08-08

Fixed an issue where some signal modes could not start synchronization and might cause the app to close unexpectedly.
Improved audio waveform playback stability and overall synchronization reliability.

### 1.6.0 — 2026-08-01

- Added time source selection: sync using NTP network time or the device time.
- Added signal mode selection: BPC and JJY users can try alternative modes when the default mode does not work well.
- Improved troubleshooting tips, including clearer guidance after repeated sync failures.
- Refined the main sync screen layout so the Start button is easier to reach.
- Improved feedback diagnostics to help us investigate sync issues more quickly.

### 1.5.0 — 2026-07-26

1. Added network time calibration with NTP support
2. Faster synchronization startup with less waiting
3. Improved fallback to phone time when network time is unavailable
4. Improved time accuracy across stations, manual time offsets, and JJY Local Time mode

## More apps by 毅 何

- [伤寒论·金匮要略—中医经方学习](https://appshunter.io/ios/app/id6781101729)
- [Stair Quest: Climb Tracker](https://appshunter.io/ios/app/stair-quest-climb-tracker/id6797885462)
- [TurnMate: CNC Lathe](https://appshunter.io/ios/app/turnmate-cnc-lathe/id6799358044)

All apps by 毅 何: https://appshunter.io/developer/1477138542

## Related topics

[clock wave](https://appshunter.io/ios/topics/clock-wave) · [radio wave sync](https://appshunter.io/ios/topics/radio-wave-sync)

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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 2026-09-09.*