JJYEmulator

1.7.0

mokyuu

4.74

1,074 reviews

100,000+
Downloads

Free

The application to which the time of the electric wave clock is adjusted.

Screenshots by mokyuu, from the Google Play listing

View on Google Play

Pros & Cons

High-accuracy time via JJY signals
NTP support adds flexibility
Free to use with core features
Japan-focused solution

Not ranked in top lists, limiting discoverability
Lacks smartwatch compatibility
Reliance on audio beeps may vary across devices

About JJYEmulator

JJYEmulator is a tools app developed by mokyuu.

How many times has JJYEmulator been downloaded?

JJYEmulator has been downloaded 280 thousand times. In the last 30 days, the app was downloaded 2.7 thousand times.

What is the rating of JJYEmulator?

JJYEmulator is rated 4.74 out of 5 stars, based on 1.1 thousand ratings.

Is JJYEmulator free?

JJYEmulator is free. The APK size is 2.73 MB. The latest APK version available is 1.7.0. The last update was on August 29, 2026.

What are the requirements for JJYEmulator?

JJYEmulator requires Android 2.3+ or higher. The app has a content rating of Everyone. The app has been available on Google Play since December 2014.

JJYEmulator is made and published by mokyuu. AppBrain is an independent app data site and isn't affiliated with mokyuu. The app name, icon, screenshots and description belong to mokyuu and are shown as published on Google Play.

Description by mokyuu (from Google Play)

Note
We will receive more emails requesting radio clocks from other countries, but since you can not create it without materials, please attach the clear material you need.

It outlines the steps to transmit the time sync audio beeps with headphones to the watch, which after a few minutes, results with the watch being synced as if the watch owner was actually in Japan.

This application synchronizes with the time of your smartphone. To synchronize the time accurately, it is recommended to use a time synchronization application etc. to make the time of your smartphone accurate.

Place headphone speakers by the atomic radio clock’s internal
antenna, with the volume as high as possible before it starts to
distort. Or, place the clock’s internal radio antenna as close as
possible to the smartphone speaker. Again, with the volume as
high as possible before it starts to distort. When time sync
receive mode is active, the clock will sync within 2 to 3
minutes.

Recent changes:
Changed target SDK version
Supports time synchronization via NTP server.

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More data about JJYEmulator

Price	Free
Total installs	280 thousand
Recent installs	2.7 thousand
Rating	4.74 based on 1.1 thousand ratings
Ranking	Not ranked
Version	1.7.0
App size	2.73 MB
Number of libraries	4
Designed for Android	2.3+
Suitable for	Everyone
Ads	Contains ads

App Performance Report

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Alternatives to JJYEmulator

Google Play Rating history and histogram

950

Installs over time

JJYEmulator has been installed 280 thousand times. Over the past 30 days, it averaged 91 installs per day.

Changelog of JJYEmulator

Show changelog

Developer information for mokyuu

mokyuu

mokyu9@outlook.com

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Comments on JJYEmulator for Android

★★★★★ Micha Valach · Sep 1, 2020

This Application works Perfect :) Please do the followings in your smartphone: 1) Select "Airplane Mode" - neither Wi-Fi nor 3G/4G/5G available 2) go to "settings" ->Date time 2a) disable "Use network provided time" 2b) disable "network-provided time zone 2c) select timezone as Japan 2d) enter your local country current date 2e) enter your local country time all above settings - will cause this app to fill in Japan however with your local Date & Time settings 3) activate this amazing Emulator mobile app 4) set full volume and put your Radio-Controlled watch as near as possible to your smartphone 5) long press (2 Sec) on button an on your watch - verify the Sec hand move towards the "RX" sign 6) Wait for about 3-4 Minutes (This app. Will communicate with the watch and transfer the Date/Time 12/24 Year... data) once the watch complete to receive all the Atomic Date&Time data, the hands will move to correct Time and the Date will be automatically fixed 7) once the Sec hand start moving in normal mode, your radio-controlled watch was already set 8) Enjoy Your Time

★★★★★ Simon Nix · Dec 22, 2022

Thank you for this. I was able to set my Citizen PMD56 with this app first time, to my local time zone. Just set the watch up to receive and open the app. It took about 5 minutes with the watch nested in one side of a pair of headphones. Other apps I tried either didn't work, or set the time to Japan local time without correcting for my time zone, forcing me to use the second time zone function of the watch to +2hrs. No such issue here. Perfect for your JDM needs.

★★★★★ Patrick Beal · Aug 2, 2023

Works perfectly. Leave it at high volume with the phone speaker close to the 12 o'clock side of your Casio MultiBand 6 and the city set to TYO, then after sync revert to your location.

★☆☆☆☆ Ramy Ebeid · Sep 9, 2022

Keeps getting Japan time not local, signal is great and watch gets it really clear but not local time

★☆☆☆☆ trayan dimitrov · Apr 13, 2025

, radio waves and sound waves are fundamentally different. Radio waves are electromagnetic waves, which can travel through a vacuum, while sound waves are mechanical waves that require a medium like air to travel. Radio waves are too quiet for humans to hear, requiring special devices like radios to convert them into audible sound, whereas we can directly hear sound waves

★☆☆☆☆ B. Bluebriz · Nov 28, 2022

Doesn't work on my Casio watch inside Japan.

Google Play Rankings for JJYEmulator

This app is not ranked

Technologies used by JJYEmulator

10 permissions · 4 libraries

Subscribe to see full permission and library details

Frequently asked questions about JJYEmulator

Is JJYEmulator free?

Yes. JJYEmulator is free on Google Play.

Is JJYEmulator still available?

Yes. JJYEmulator is on Google Play, and the last update we saw was on August 29, 2026.

Does JJYEmulator contain ads?

Yes. Google Play lists JJYEmulator as containing ads.

What Android version does JJYEmulator require?

JJYEmulator runs on Android 2.3 and higher.

How large is JJYEmulator?

JJYEmulator is 2.73 MB.

Is JJYEmulator suitable for children?

Google Play rates the content of JJYEmulator as suitable for everyone.

How many times has JJYEmulator been installed?

Google Play lists 100,000+ installs for JJYEmulator.

How do people rate JJYEmulator?

JJYEmulator scores 4.74 out of 5 stars, from 1,074 ratings on Google Play.

Who made JJYEmulator?

JJYEmulator was developed by mokyuu. It is listed in the tools category on Google Play.

What are the best alternatives to JJYEmulator?

People looking at JJYEmulator also look at these tools apps: SyncTime: JJY, WWVB & MSF, radio watch sync, Huge Digital Clock Widget, Atomic Clock - Exact Time, UTC Clock.

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More apps

JJYEmulator

The application to which the time of the electric wave clock is adjusted.

Pros & Cons

About JJYEmulator

How many times has JJYEmulator been downloaded?

What is the rating of JJYEmulator?

Is JJYEmulator free?

What are the requirements for JJYEmulator?

More data about JJYEmulator

Alternatives to JJYEmulator

More from mokyuu

Google Play Rating history and histogram

Installs over time

Changelog of JJYEmulator

Developer information for mokyuu

Share JJYEmulator

Comments on JJYEmulator for Android

Google Play Rankings for JJYEmulator

Technologies used by JJYEmulator

Frequently asked questions about JJYEmulator

Is JJYEmulator free?

Is JJYEmulator still available?

Does JJYEmulator contain ads?

What Android version does JJYEmulator require?

How large is JJYEmulator?

Is JJYEmulator suitable for children?

How many times has JJYEmulator been installed?

How do people rate JJYEmulator?

Who made JJYEmulator?

What are the best alternatives to JJYEmulator?