SyncTime: JJY, WWVB & MSF

SWard Dev

About this app

SyncTime syncs the time on your radio controlled atomic watch/clock — even when the time signal radio station is out of range.

SyncTime is comprised of a JJY, WWVB & MSF emulator/simulator.

Why Use SyncTime?
- SyncTime is completely silent.
- SyncTime allows you to override the timezone with any timezone of your choice.
- SyncTime uses NTP time for the most accurate time (requires internet).
- SyncTime allows you to sync the time when the screen is off or when SyncTime is running in the background. This feature is device dependent as some devices may close or mute SyncTime.
- No Ads.

Supported Time Signals:
JJY60
WWVB
MSF

Due to the limitations of physics and the speakers used in Android devices, these time signals are the only signals capable of being supported whilst also being fully silent.

Instructions:
1. Turn your volume up to the maximum.
2. Place your radio controlled atomic watch/clock beside your speakers/headphones.
3. Activate the time sync on your watch/clock.
4. Select the time signal supported by your watch/clock.
5. (WWVB only) Select the timezone that is set on your watch/clock. Timezones include Pacific Time (PT), Mountain Time (MT), Central Time (CT), Eastern Time (ET), Hawaii Time (HT), and Alaska Time (AKT).
6. Press the play arrow to start syncing. After approximately 3-10 minutes your watch/clock should be synced.

Note: Watches/clocks which have a 'home city' setting may need to be set to a city which can receive the official radio station time signals. After syncing, the 'home city' can be reverted.

Ratings and reviews

I was extremely skeptical that this would work. many people said that an app would not work because audio is not the same thing as radio waves. But this did indeed work. needed to play around with placing the phone properly next to the watch, but once I nailed that down, it synced right away, first attempt.

Did not work on the first try. Followed up with a couple of adjustments on my phone. Now it works fine. Great that it is silent. I want to add a couple of comments that may help other users: 1. On my phone, if Bluetooth is on; my phone plays to my hearing aids. Since the app is silent a user may not immediately grasp why the app is not working. 2. It may be useful to determine the interval at which the phone itself syncs with NTP. I have observed variances between phones and my WWV clock.

This app is truly silent when it is generating its WWVB time signal, unlike the free apps. You can run this app on your phone/tablet and be in the same room with it without going deaf. I use this app to sync wall clocks from La Crosse and Geevon when the real WWVB signal is weak. The only con is that its generated signal is weaker than those from the noisy free apps, so the watch/clock will need to be closer to the phone/tablet to pick up the signal. It's the trade-off for no loud beeping noise.

What’s new

Added support for 16 KB memory page sizes.