A radio wave for electric wave clocks (WWVB) is offered.
About WWVB Emulator
WWVB Emulator is a productivity app developed by mokyuu.
Download Statistics
WWVB Emulator has been downloaded 28 thousand times. In the last 30 days, the app was downloaded 320 times.
User Ratings
WWVB Emulator is rated 4.64 out of 5 stars. The rating is based on 330 ratings.
App Information
WWVB Emulator is FREE to download. The APK download size is 2.74 MB. The latest version available is 1.3.3. The last update was on July 4, 2025.
Technical Requirements
WWVB Emulator requires Android 2.3+ or higher. The app has a content rating of Everyone. The app has been available on Google Play December 2018.
Description
Attention: There are a lot of people this application requests, so it's made. But there is no environment that a maker tests. Operation guaranteed won't be done.
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This app really works. The DST changed this weekend and one of my casio's didn't sync properly, so it was one hour off. I couldn't manually sync it during the day, so I found this app and was skeptical whether it would work, but it does. The first time I tried it, I had the smartphone speaker set to max volume, and it didn't work. So I tried again with 75% volume and it worked. I had to position the speaker so that it was firing directly into the center of the watch face. Then, as a test, I tried to manually sync with the WWVB tower about 15 minutes later and much to my amazement it synced as well. So I wasn't sure whether the watch picked up the app signal or the tower signal. I tried again the next day but this time I did the manual sync to the tower first. It failed. Then I tried with the app using the same settings and position of speaker and it worked. So as a final test, I tried to manually sync with the WWVB tower again, and it failed. So now I'm confident to say that this app works. Thank you.
★★★★★Dave Primavera· Mar 27, 2025
Worked perfectly! Saved me the annoyance of having to look at an unset clock after changing the batteries and waiting for it to sync. Great work!
★★★★★Tobias Hilton· Jun 7, 2024
Great APP for CASIO watches works great for those of us out of signal range
★☆☆☆☆michael· Oct 16, 2021
Ineffective. Watch is now approximately 8 months behind. Instructions for 2 to 3 minutes. Tried for 20 minutes. Not as awful and loud as the last app I've tried. But still just as useless.
★★☆☆☆Kirk Kohnen· Mar 2, 2022
Doesn't sync to actual time, syncs watch to the phone's time. If the time on the phone is off, the watch will be too.
★★☆☆☆Glenn Brockett· Dec 11, 2025
Didn't work with my phone (Samsung A52) and my Citizen watch or "Sky Scan" clock.
★★☆☆☆Paul Richardson· Sep 24, 2021
App works but seems to be about 2 seconds slow when compared to other atomic sources (watch synced via Bluetooth, watch synced via multiband 6, time.is website). I'd rather just manually set it.
Google Play Rankings for WWVB Emulator
This app is not ranked
Technologies used by WWVB Emulator
WWVB Emulator is requesting 9 permissions and is using 4 libraries.
Each subscription will automatically renew 3 days before the expiration date for
the same time period. Subscriptions can be cancelled at any time before the renewal.
AdMob
Android Jetpack core
Firebase
Google Cloud Messaging (GCM)