FOSS Warn
FOSS Warn is a free, open-source utility app for Android. Receive emergency alerts worldwide. It has 254 GitHub stars and is released under the GPL-3.0-only license, and you can install it from F-Droid.
- Android
- Flutter
- Utilities
- Actively maintained
About FOSS Warn
FOSS Warn is an app for receiving global emergency alerts. Whether it's flooding, a tsunami, or bomb disposal, if there's an alert, you'll receive it. FOSS Warn uses the FOSS Public Alert Server to obtain alerts. This aggregates official feeds with alerts from over 100 countries worldwide. A list of supported countries can be found here: Features: - Receive alerts in over 100 countries worldwide - Receive push notifications via UnifiedPush - Display alerts on a map - Material 3 FOSS Warn and the FOSS Public Alert Server are independent and in no way affiliated with any official authority.
Privacy and F-Droid
F-Droid builds FOSS Warn 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 FOSS Warn?
FOSS Warn is a free, open-source utility app for Android. Receive emergency alerts worldwide. It has 254 GitHub stars and is released under the GPL-3.0-only license, and you can install it from F-Droid.
Is FOSS Warn free and open source?
Yes. FOSS Warn'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 FOSS Warn?
You can install FOSS Warn from F-Droid (package de.nucleus.foss_warn); the links are on this page. Its GitHub repository also publishes releases (latest: 1.1.1).
Is FOSS Warn still maintained?
The repository's most recent commit was on Sep 9, 2026. Its F-Droid listing was last updated on Sep 2, 2026. appsgit only lists apps whose repository had a commit in the last six months.