JJYEmulator

1.7.0

mokyuu

4.74

1,059 reviews

100,000+
Downloads

Free

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

Download from Google Play

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.

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 to download. The APK download size is 2.73 MB. The latest 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 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.

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 to download
Total downloads	280 thousand
Recent downloads	2.7 thousand
Rating	4.74 based on 1.1 thousand ratings
Ranking	Not ranked
Version	1.7.0
APK 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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Alternative downloads for the JJYEmulator app

JJYEmulator compared with similar apps

Common keywords of similar apps

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

Keywords missing from this app

App Smart Phone Display Digital Smartwatch Atomic Watches World Accuracy Bluetooth Screen Devices Supported Bt Alarm Features Ntp Accurate Recent Free Experience Settings Light Synctime Device Set Information Big Connect Notificator Notification Turn Stay Servers Find Battery Reminder Widget Notifier Hour User Huge

Google Play Rating history and histogram

Rating history

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930

Downloads over time

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JJYEmulator has been downloaded 280 thousand times. Over the past 30 days, it averaged 92 downloads per day.

Changelog of JJYEmulator

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Developer information for mokyuu

mokyuu

mokyu9@outlook.com

Website

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Comments on JJYEmulator for Android

★★★★★ Go FiveG · Jan 19, 2022

This amazing free App allows your Atomic Clock Watch to receive the emulated signal of the transmitter synced to your smartphone (mine is an android), to have the most accurate time. NOTE: My watch resides in the middle of the largest Ocean and does not receive the typical over the air signal from the various World atomic type clocks (ones that transmit the time signal to watches). My watch is from Japan, I used this signal from Japan. Put watch on phone speaker loud for 1 day, it works.

★★★★★ 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.

★☆☆☆☆ 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.

★☆☆☆☆ Ramy Ebeid · Sep 9, 2022

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

Google Play Rankings for JJYEmulator

This app is not ranked

Technologies used by JJYEmulator

10 permissions · 4 libraries

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