SyncTime: JJY, WWVB & MSF
SyncTime: JJY, WWVB & MSF is made and published by SWard Dev. AppBrain is an independent app data site and isn't affiliated with SWard Dev. The app name, icon, screenshots and description belong to SWard Dev and are shown as published on Google Play.
AppBrain's verdict
EstablishedNiche- Rating on Google Play
- 4.92
- 20 ratings
- Installs
- 390
- Last updated
- August 29, 2025
- Ads
- No ads
- Size
- 14.8 MB
SyncTime: JJY, WWVB & MSF is a niche app, with 390 installs. It doesn't have enough ratings yet to judge what users think.
Summary
SyncTime is a radio time sync emulator for JJY, WWVB, and MSF signals, designed to help you calibrate watches and clocks even when signal range is limited. It runs silently, leverages NTP for accurate time when online, and allows timezone overrides—all without ads. With 100+ total downloads and 11 in the last 30 days, it serves a niche but highly-rated timekeeping solution (not ranked in any top lists).
Pros & Cons
- Silent, ad-free operation
- Supports multiple time signals (JJY60, WWVB, MSF)
- Timezone override for flexible testing
- NTP-based accuracy when online
- Background/screen-off syncing on many devices
- Dedicated emulator for external clocks and watches
- No widget support noted in feature set
- Lacks broader clock features (e.g., generic digital display or alarms) typically found in general clock apps
- Scope is focused on radio time signal emulation rather than universal timekeeping features
User feedback
Ratings and reviews on Google PlayComments on SyncTime: JJY, WWVB & MSF for Android
Google Play Rating history and histogram
Store listing
By SWard Dev, from Google Play“Radio controlled atomic time syncing: JJY, WWVB & MSF emulator/simulator”
Description by SWard Dev Written by the developer, not by AppBrain. Click to read.
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.
Recent changes:
Added support for 16 KB memory page sizes.
Safety and technology
Found in the app by AppBrain- Ads
- No ads
- Price
- $3.99
- Libraries
- ?
- App size
- 14.8 MB
- Content rating
- Everyone
Technologies used by SyncTime: JJY, WWVB & MSF
Releases
Updates seen on Google Play- Version
- 10
- Launched
- October 2022
Alternatives
Similar apps and more from SWard DevAlternatives to SyncTime: JJY, WWVB & MSF
Installs
Tracked by AppBrain- Last 30 days
- 11
- Play install range
- 100+
- Launched
- October 2022
Installs over time
SyncTime: JJY, WWVB & MSF has been installed 390 times. Over the past 30 days, it has been installed 11 times.
Rankings
Google Play top chartsGoogle Play Rankings for SyncTime: JJY, WWVB & MSF
About the app and developer
About SyncTime: JJY, WWVB & MSF
SyncTime: JJY, WWVB & MSF is a tools app developed by SWard Dev.
Install Statistics
SyncTime: JJY, WWVB & MSF has been installed 390 times. In the last 30 days, the app was installed 11 times.
User Ratings
SyncTime: JJY, WWVB & MSF is rated 4.92 out of 5 stars. The rating is based on 20 ratings.
App Information
SyncTime: JJY, WWVB & MSF costs $3.99. The app size is 14.77 MB. The latest version available is 10. The last update was on August 29, 2025.
Technical Requirements
The app has a content rating of Everyone. The app has been available on Google Play since October 2022.
App Performance Report
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