Amber
Amber is a free, open-source social media client for Android. Nostr event signer for Android. It has 354 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 Amber
Amber is a nostr event signer for Android. It allows users to keep their nsec segregated in a single, dedicated app. The goal of Amber is to have your smartphone act as a NIP-46 signing device without any need for servers or additional hardware. "Private keys should be exposed to as few systems as possible as each system adds to the attack surface," as the rationale of said NIP states. In addition to native apps, Amber aims to support all current nostr web applications without requiring any extensions or web servers.
Privacy and F-Droid
F-Droid builds Amber 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.
Similar apps
More open-source social and Fediverse clients
Bangumi
czy0729/Bangumi
A third-party client for Bangumi.
Social & Fediverse clientsAndroidiOS
RedReader
QuantumBadger/RedReader
Client for reddit.com.
Social & Fediverse clientsAndroidMastodon for iOS
mastodon/mastodon-ios
This is the repository for the official iOS app for Mastodon.
OfficialSocial & Fediverse clientsiOS
Mastodon
mastodon/mastodon-android
Where conversations happen.
OfficialSocial & Fediverse clientsAndroid
Voyager for Lemmy
aeharding/voyager
Voyager — a beautiful app for Lemmy and Piefed.
Social & Fediverse clientsAndroidiOS
Hacki for Hacker News
Livinglist/Hacki
An open-source Hacker News client.
Social & Fediverse clientsAndroidiOS
What is Amber?
Amber is a free, open-source social media client for Android. Nostr event signer for Android. It has 354 GitHub stars and is released under the MIT license, and you can install it from F-Droid.
Is Amber free and open source?
Yes. Amber'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 Amber?
You can install Amber from F-Droid (package com.greenart7c3.nostrsigner); the links are on this page. Its GitHub repository also publishes releases (latest: v6.6.7).
Is Amber still maintained?
The repository's most recent commit was on Oct 5, 2026. Its F-Droid listing was last updated on Oct 1, 2026. appsgit only lists apps whose repository had a commit in the last six months.