World Wide Radio Clock Adjust

Sync your radio-controlled clocks perfectly, anywhere in the world, using just your smartphone.
"World Wide Radio Clock Adjuster (World Radio Clock Sync Simulator)" is a high-performance utility app that simulates time signals from 6 major radio stations across 5 countries (JJY40/JJY60, WWVB, BPC, DCF77, MSF).
If you are inside a high-rise building, in a basement, or living outside your clock's native signal coverage area where real atomic radio waves cannot reach, this app is the perfect solution. By generating a specialized simulated audio signal from your smartphone's speaker, you can easily synchronize and calibrate your atomic clock to the exact time simply by holding it close.
【Completely Free & Ad-Free】
No annoying banner ads, no forced video pop-ups. Enjoy a completely free, seamless, and stress-free utility experience anytime you need it.

🌟 Key Features

• Global Coverage (6 Major Stations Supported)
Simulates time signal formats for 6 major atomic clock transmitters worldwide, ensuring compatibility with domestic and international multi-band radio clocks.
• 🇯🇵 JJY (40kHz / 60kHz) - Japan (Fukushima / Kyushu)
• 🇺🇸 WWVB (60kHz) - United States
• 🇨🇳 BPC (68.5kHz) - China
• 🇩🇪 DCF77 (77.5kHz) - Germany
• 🇬🇧 MSF (60kHz) - United Kingdom
• Simple "Hold & Sync" Operation
No complicated setup required. Just select the correct radio wave format for your watch/clock, tap play, and place your device next to the clock's internal antenna.
• Offline Operation Support
No internet connection required to transmit. The app generates the necessary acoustic signal locally, making it useful even in remote offline environments.

🛠 How to Use (Step-by-Step)

1. Prepare Your Device
Turn your smartphone's media volume up to the maximum (MAX) level.
2. Select the Radio Station
Choose the time signal format that your radio-controlled clock is designed to receive (e.g., select WWVB for US clocks, or JJY for Japanese clocks).
3. Start Transmission
Tap the "Start Sync" / "Transmit" button in the app.
4. Position Your Clock
Switch your watch or clock to its "Manual Receive" or "Forced Sync" mode. Place the clock's antenna as close to your smartphone's speaker as possible.
5. Wait for Completion
The synchronization process typically takes between 2 to 10 minutes. Keep the devices stationary until the sync is complete.

⚠️ Important Notes & Tips

• Volume is Key: This app utilizes a high-frequency, coded audio signal (a high-pitched tone within the audible range) to simulate radio waves. If the volume is too low, the clock won't recognize the signal. Always maximize your phone's volume.
• The Earphone Trick: If you cannot play loud sounds out loud, or if the sync keeps failing, plug a pair of wired earphones into your phone. Wrap the earphone cable tightly around your watch or clock's casing. The cable will act as a close-range transmitter to pass the signal directly to the clock's internal antenna.
• Minimize Background Noise: Environmental noise can interfere with the signal transmission. For the best results, use the app in a quiet room.
• Smartphone Time Accuracy: This app generates signals based on your smartphone's internal clock. Please ensure your smartphone is connected to the network and set to automatically sync with network time (NTP) for perfect accuracy.