# Amber (open-source social media client)

> 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.

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.

## Key facts

| Fact | Value |
|---|---|
| Repository | https://github.com/greenart7c3/Amber |
| Platforms | Android |
| Built with | Kotlin |
| GitHub stars | 354 |
| License | MIT (open source) |
| F-Droid | https://f-droid.org/packages/com.greenart7c3.nostrsigner/ (package com.greenart7c3.nostrsigner) |
| F-Droid anti-features | none flagged |
| Google Play | not linked |
| App Store | not linked |
| Website | none listed |
| Official | no |
| Category | Social & Fediverse clients |
| Latest release | v6.6.7 (Oct 5, 2026) |
| Last commit | Oct 5, 2026 |

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

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Canonical page: https://appsgit.com/mobile-apps/amber
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