JJYEmulator

1.6.3

mokyuu

4.73

1,030 reviews

100,000+
Downloads

Free

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

Pros & Cons

Niche, audio-based time synchronization using the phone as the reference clock
Free to use with standard ad/analytics libraries (AdMob, Firebase) enabled
Mature app age (4188 days) suggesting stability and long-term support
Clear setup guidance for positioning around the clock’s antenna and using volume effectively

Relies on an audio-based sync method rather than automatic network time synchronization
Requires manual steps and hardware placement (headphones near the clock) for proper operation
Lacks modern features common in competitors (e.g., digital displays, smartwatch compatibility, widgets)

About JJYEmulator

JJYEmulator is a tools app developed by mokyuu.

Download Statistics

JJYEmulator has been downloaded 270 thousand times. In the last 30 days, the app was downloaded 2.3 thousand times.

User Ratings

JJYEmulator is rated 4.73 out of 5 stars. The rating is based on 1 thousand ratings.

App Information

JJYEmulator is FREE to download. The APK download size is 7.49 MB. The latest version available is 1.6.3. The last update was on July 3, 2025.

Technical Requirements

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

Description

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.

More data about JJYEmulator

Price	Free to download
Total downloads	270 thousand
Recent downloads	2.3 thousand
Rating	4.73 based on 1 thousand ratings
Ranking	Not ranked
Version	1.6.3
APK size	7.49 MB
Number of libraries	4
Designed for Android	2.3+
Suitable for	Everyone
Ads	Contains ads

App Performance Report

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Alternative downloads for the JJYEmulator app

JJYEmulator compared with similar apps

Common keywords of similar apps

Application Smartphone Receive Minutes Place Internal Antenna Volume High Starts Distort Time Radio Sync Watch Clock

Keywords missing from this app

App Strong Display Analog Digital Screen Smartwatch Atomic Ntp Phone Smart Accuracy World Experience Devices Stay Accurate Wear Live Watches Servers Features Free Wallpaper Os Utc Home Recent Bt Battery Date Device Easy Widget Synctime Big Seconds Notificator Choose Alarm Lock Mode Precision Designed Check

Google Play Rating history and histogram

Downloads over time

JJYEmulator has been downloaded 270 thousand times. Over the past 30 days, it averaged 77 downloads per day.

Changelog of JJYEmulator

Show changelog

Developer information for mokyuu

mokyuu

mokyu9@outlook.com

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Comments on JJYEmulator for Android

★★★★☆ Aus 1 · Mar 5, 2023

Works excellent, I find If I put metal under watch it helps receiver in watch. One issue is it uses local time and some watches ⌚️ know the region and will not receive unless set to Tokyo area. App needs option to broadcast Tokyo JJY time. Then when finished rest to non JJY time zone. Work around is to then manually adjust hour on watch after it has updated.

★★★★★ Fazeel Jeddavi · Aug 7, 2025

Excellent app.... helped me to sync my Casio & Seiko watches

★★★★★ John Spence · Jul 26, 2025

I bought a Citizen PMD56 radio-controlled watch that was a Japan Domestic Product. I live in the US and obviously can't receive the Japan atomic clock transmissions. The watch arrived set to Tokyo time, 13 hours ahead. This app was totally trouble free and perfectly easy. The only problem I had was figuring out how to set the watch in reception mode. Once I did, I left my phone and the watch sitting together and the time, day and date reset to correspond with the settings on my phone. Thank you!

★☆☆☆☆ 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

JJYEmulator is requesting 9 permissions and is using 4 libraries.
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