Citrine
Citrine is a free, open-source social media client for Android. Nostr relay for Android. It has 134 GitHub stars and is released under the MIT license, and you can install it from F-Droid.
- Android
- Kotlin
- Social & Fediverse clients
- Actively maintained
About Citrine
Citrine is a nostr relay for android. It allows any nostr client that supports Android to send and receive events from this application.
Privacy and F-Droid
F-Droid builds Citrine 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 Citrine?
Citrine is a free, open-source social media client for Android. Nostr relay for Android. It has 134 GitHub stars and is released under the MIT license, and you can install it from F-Droid.
Is Citrine free and open source?
Yes. Citrine'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 Citrine?
You can install Citrine from F-Droid (package com.greenart7c3.citrine); the links are on this page. Its GitHub repository also publishes releases (latest: v3.2.0).
Is Citrine still maintained?
The repository's most recent commit was on Sep 18, 2026. Its F-Droid listing was last updated on Oct 6, 2026. appsgit only lists apps whose repository had a commit in the last six months.