Casio G-Shock Smart Sync
Casio G-Shock Smart Sync is a free, open-source calendar and contacts app for Android. Add smart functions to your Casio square BT G-Shock Watch. It has 304 GitHub stars and is released under the MIT license, and you can install it from F-Droid and Google Play.
github.com/izivkov/CasioGShockSmartSync (opens in a new tab)
- Android
- Kotlin
- Calendar & contacts
- Actively maintained
About Casio G-Shock Smart Sync
G-Shock Smart Sync is an unofficial, open-source Android app for G-Shock, Edifice, and Pro Trek watches. It allows you to control your watch, sync data, and configure settings without a Casio ID. It offers a faster, privacy-focused, and more powerful alternative to the official Casio app. Key Features: - No Account Required: Skip the Casio ID login entirely. - Calendar Sync: Push your calendar events (Google, Samsung, etc.) to your watch as reminders. - Auto Timezone: Automatically adjusts watch time when you travel. - Remote Control: Use your watch buttons to take photos, control music, or launch voice assistants. - Alarm Sync: Configure watch alarms easily from your phone.
Privacy and F-Droid
F-Droid builds Casio G-Shock Smart Sync from its published source code and flags anti-features such as ads, tracking or reliance on non-free services.
No anti-features flagged on the latest F-Droid build.
Screenshots
Screenshots from the app's F-Droid listing.
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What is Casio G-Shock Smart Sync?
Casio G-Shock Smart Sync is a free, open-source calendar and contacts app for Android. Add smart functions to your Casio square BT G-Shock Watch. It has 304 GitHub stars and is released under the MIT license, and you can install it from F-Droid and Google Play.
Is Casio G-Shock Smart Sync free and open source?
Yes. Casio G-Shock Smart Sync's source code is public on GitHub under the MIT license, which is OSI-approved or FSF-free. F-Droid, which builds it from source, flags no anti-features such as ads or tracking on its latest build.
How do I install Casio G-Shock Smart Sync?
You can install Casio G-Shock Smart Sync from F-Droid (package org.avmedia.gshockGoogleSync) and from Google Play; the links are on this page. Its GitHub repository also publishes releases (latest: v42.9.11).
Is Casio G-Shock Smart Sync still maintained?
The repository's most recent commit was on Sep 21, 2026. Its F-Droid listing was last updated on Sep 20, 2026. appsgit only lists apps whose repository had a commit in the last six months.