Radio Wave Sync for iPhone

App summary and purpose

Radio Wave Sync is a free iPhone utility created by developer Ning Jin (宁金). It was built to help radio-controlled wristwatches that are unable to pick up terrestrial time-signal broadcasts. The app generates an audible time-code simulation so you can recalibrate your watch’s clock without waiting for a station signal.

Quick setup — step by step

1. Put your watch into its manual receive or time-sync mode so it will accept an external signal.
2. Turn your iPhone’s volume all the way up for the strongest audio output.
3. Tap Start (or the equivalent control) in the app to begin emitting the simulated time signal.
4. Position the watch close to the iPhone’s speaker — close proximity improves reliability.
5. Allow the process to run; synchronization normally completes within 3–10 minutes.
6. Perform this in a quiet area to reduce interference and get the best results.

Time-signal systems supported

• DCF77 (Germany)
• MSF (United Kingdom)
• WWVB (United States)
• BPC (China)
• JJY 40 kHz / 60 kHz (Japan)

Faster syncing option

The app includes an enhanced transmission mode (often labeled “Beast Mode”) that emits higher-rate simulation pulses to shorten lock time on some watches. Use this mode with caution and keep the watch close to the speaker while monitoring the process.

Tips and troubleshooting

• Maximize your phone volume each time you try to sync.
• Choose a quiet location, away from loud background noise or other electronics that could interfere.
• If synchronization repeatedly fails, try adjusting the watch’s orientation relative to the speaker or moving closer.

Support and feedback

If you need help or have questions about using the app, contact the developer via QQ or by email for assistance.