Fossify Calendar
Fossify Calendar is a free, open-source calendar and contacts app for Android. Securely plan, schedule, and set reminders with our private calendar app. It has 2,205 GitHub stars and is released under the GPL-3.0-only license, and you can install it from F-Droid and Google Play.
- Official
- Android
- Kotlin
- Calendar & contacts
- Actively maintained
About Fossify Calendar
Tired of cluttered calendars and privacy concerns? Fossify Calendar is here to change that. Your open-source powerhouse for managing life, designed with privacy as its core and packed with powerful features to keep you organized. Here's what makes Fossify Calendar different: AD-FREE AND PRIVATE: Your events remain yours. No ads, no tracking, no intrusive permissions. FLEXIBLE AND CUSTOMIZABLE: Craft events precisely with times, durations, reminders, and advanced repetition rules. SEAMLESS SYNCING: Sync effortlessly with Google Calendar, Outlook, Nextcloud, Exchange, and more.
Privacy and F-Droid
F-Droid builds Fossify Calendar 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 Fossify Calendar?
Fossify Calendar is a free, open-source calendar and contacts app for Android. Securely plan, schedule, and set reminders with our private calendar app. It has 2,205 GitHub stars and is released under the GPL-3.0-only license, and you can install it from F-Droid and Google Play.
Is Fossify Calendar free and open source?
Yes. Fossify Calendar's source code is public on GitHub under the GPL-3.0-only 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 Fossify Calendar?
You can install Fossify Calendar from F-Droid (package org.fossify.calendar) and from Google Play; the links are on this page. Its GitHub repository also publishes releases (latest: 1.11.0).
Is Fossify Calendar still maintained?
The repository's most recent commit was on Oct 8, 2026. Its F-Droid listing was last updated on Sep 25, 2026. appsgit only lists apps whose repository had a commit in the last six months.