# Casio G-Shock Smart Sync (open-source calendar and contacts app)

> 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.

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.

## Key facts

| Fact | Value |
|---|---|
| Repository | https://github.com/izivkov/CasioGShockSmartSync |
| Platforms | Android |
| Built with | Kotlin |
| GitHub stars | 304 |
| License | MIT (open source) |
| F-Droid | https://f-droid.org/packages/org.avmedia.gshockGoogleSync/ (package org.avmedia.gshockGoogleSync) |
| F-Droid anti-features | none flagged |
| Google Play | https://play.google.com/store/apps/details?id=org.avmedia.gshockGoogleSync |
| App Store | not linked |
| Website | none listed |
| Official | no |
| Category | Calendar & contacts |
| Latest release | v42.9.11 (Sep 17, 2026) |
| Last commit | Sep 21, 2026 |

F-Droid builds its apps from source and flags anti-features: https://f-droid.org/en/docs/Anti-Features/

## Similar mobile apps

- [Tuta Calendar](https://appsgit.com/mobile-apps/tuta-calendar): Quantum-safe encrypted planner to schedule & manage your events & sync calendars. (7,986 stars, GPL-3.0-or-later, official)
- [DAVx⁵](https://appsgit.com/mobile-apps/davx): CalDAV/CardDAV Synchronization and Client. (2,931 stars, GPL-3.0-only)
- [Etar](https://appsgit.com/mobile-apps/etar): Etar is a material designed open source calendar, for everyone! (2,608 stars, GPL-3.0-only)
- [Fossify Calendar](https://appsgit.com/mobile-apps/fossify-calendar): Securely plan, schedule, and set reminders with our private calendar app. (2,205 stars, GPL-3.0-only, official)
- [Birday](https://appsgit.com/mobile-apps/birday): A simple yet useful birthday manager. Birday is free and ad-free! (1,193 stars, MIT)
- [Persian Calendar](https://appsgit.com/mobile-apps/persian-calendar): Android Persian Calendar. (984 stars, GPL-3.0-only)

---

Canonical page: https://appsgit.com/mobile-apps/casio-g-shock-smart-sync
Source: appsgit (https://appsgit.com), the app store for github. Data from the GitHub API, refreshed nightly.
Machine access: JSON API https://appsgit.com/api/v1/apps (OpenAPI: https://appsgit.com/openapi.json), MCP server https://mcp.appsgit.com/mcp, full index https://appsgit.com/llms-full.txt.