SyncTime: JJY, WWVB & MSF

SWard Dev

4.91

19 reviews

100+
Downloads

$3.99

Radio controlled atomic time syncing: JJY, WWVB & MSF emulator/simulator

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SyncTime: JJY, WWVB & MSF Screenshot 4 of 4

4.91 · 19 reviews · 100+ downloads

Download from Google Play

SyncTime is a radio time-sync emulator for JJY, WWVB, and MSF signals, enabling silent synchronization on Android devices. It offers NTP-based accuracy, a timezone override, and background syncing, all without ads. Ranked #68 in TOOLS in se with a 4.91 rating from 19 users and 100+ total downloads (6 in the last 30 days).

Pros & Cons

Silent operation and no ads
Supports JJY60, WWVB, and MSF signals
NTP-based accuracy for internet-connected devices
Timezone override for flexible testing

Relies on internet access for the most accurate sync (NTP)
Background syncing may vary by device and may not work universally
Paid app at $3.99

About SyncTime: JJY, WWVB & MSF

SyncTime: JJY, WWVB & MSF is a tools app developed by SWard Dev.

Download Statistics

SyncTime: JJY, WWVB & MSF has been downloaded 380 times. In the last 30 days, the app was downloaded 6 times.

User Ratings

SyncTime: JJY, WWVB & MSF is rated 4.91 out of 5 stars. The rating is based on 19 ratings.

App Information

SyncTime: JJY, WWVB & MSF costs $3.99 to download. The APK download 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 October 2022.

Description

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

More data about SyncTime: JJY, WWVB & MSF

Price	$3.99
Total downloads	380
Recent downloads	6
Rating	4.91 based on 19 ratings
Ranking	Not ranked
Version	10
APK size	14.8 MB
Number of libraries	?
Suitable for	Everyone
Ads	NO ads

App Performance Report

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Alternative downloads for the SyncTime: JJY, WWVB & MSF app

SyncTime: JJY, WWVB & MSF compared with similar apps

Common keywords of similar apps

Synctime Wwvb Msf Signals Jjy Controlled Syncing Supported Emulator Simulator Signal Station Silent Devices Speakers Select Time Watch Clock Radio Atomic Timezone City Sync Set Home

Keywords missing from this app

App World Screen Display Digital Widget Ntp Analog Global Hour Features Alarm Timer Mode Recent Accuracy Free Color Accurate Live Zones Widgets Lock Place Clocks Work Flip Application Phone Countries Servers Date Battery Zone Perfect Version Server Options Support Simple

Google Play Rating history and histogram

Rating history

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Downloads over time

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SyncTime: JJY, WWVB & MSF has been downloaded 380 times. Over the past 30 days, it has been downloaded 6 times.

Changelog of SyncTime: JJY, WWVB & MSF

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Developer information for SWard Dev

SWard Dev

swarddev@gmail.com

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Comments on SyncTime: JJY, WWVB & MSF for Android

★★★★☆ Danny Mann · Oct 7, 2022

It does what it says. It's not silent, but I'm not too bothered by it. One issue is it doesn't send DST. You can work around by setting the timezone override, but the timezone you have to override to makes very little sense. I set it to ETC/-1GMT to get it to advance my clock forward 1hr for DST. It would be better if there were a checkbox to send the flag for DST as my clock picks that up and even changes the timezone to indicate DST. I tested and confirmed the real WWVB signal sends DST state.

★★★★★ Kum Fung · Jul 21, 2025

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.

Google Play Rankings for SyncTime: JJY, WWVB & MSF

This app is not ranked

Technologies used by SyncTime: JJY, WWVB & MSF

3 permissions

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Trust & Safety: Permissions are limited to INTERNET and a license check; a non-exported dynamic receiver is declared (ward.shane.synctime.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION). No location or sensitive data permissions are requested. The app is sold at $3.99 and advertises no ads, which supports a privacy-friendly experience.

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