Amber Offline

com.greenart7c3.nostrsigner.offline
by greenart7c3

Nostr event signer for Android, without network access

Amber is a nostr event signer for Android. It allows users to keep their nsec segregated in a single, dedicated app. "Private keys should be exposed to as few systems as possible as each system adds to the attack surface."

First release: Nov 9, 2026, 1 total release.

Most recent release: Nov 9, 2026.

Repo

Appears in 0 app stacks.

0 sats / 0 zaps received in the past year.

Sats Received

Underlying data available via MCP: app_zaps, app_releases.

Zap Count

Underlying data available via MCP: app_zaps, app_releases.

Releases

  • Nov 9, 2026 7.0.0-pre3 beta
    # Amber 7.0.0-pre3 - New: a local WebSocket relay on Android (ws://127.0.0.1:7777, off by default, under Settings → Relays) so NIP-46 clients on the phone reach the bunker without public relays - New: the offline flavor now installs side-by-side with the online Amber, with its own application id and the launcher name "Amber Offline" - New: British English translation - New: an install-desktop-entry.sh script in the Linux desktop tarball that adds Amber to the app launcher - Show the relays that connections use on the desktop relays screen, with their live status - Show native Approve / Reject buttons on request notifications on Omarchy's Hyprland shell - Format dates and times with the system date order and 12/24-hour setting on Android and desktop - Decide relay auth requests on the desktop per relay like Android does, with an "All relays" choice and a client auth whitelist
    More…
    - Show the desktop window again when Amber is opened from the app launcher while it already runs - Fix the desktop Linux request popup becoming a large centered window on floating workspaces - Fix the start-on-boot service failing to write the local signer socket directory on Linux - Fix the squeezed relay port field on the Android relays screen - Fix one account failing relay auth on the desktop aborting it for the other accounts - Share every string and permission description between the Android and desktop apps, which updates outdated labels on desktop Download it with [Zapstore](https://zapstore.dev/apps/com.greenart7c3.nostrsigner), [Obtainium](https://github.com/ImranR98/Obtainium), [f-droid](https://f-droid.org/packages/com.greenart7c3.nostrsigner) or download it directly in the [releases page](https://github.com/greenart7c3/Amber/releases/tag/v7.0.0-pre3) If you like my work consider making a [donation](https://greenart7c3.com) ## Verifying the release In order to verify the release, you'll need to have `gpg` or `gpg2` installed on your system. Once you've obtained a copy (and hopefully verified that as well), you'll first need to import the keys that have signed this release if you haven't done so already: ``` bash gpg --keyserver hkps://keys.openpgp.org --recv-keys 44F0AAEB77F373747E3D5444885822EED3A26A6D ``` Once you have his PGP key you can verify the release (assuming `manifest-v7.0.0-pre3.txt` and `manifest-v7.0.0-pre3.txt.sig` are in the current directory) with: ``` bash gpg --verify manifest-v7.0.0-pre3.txt.sig manifest-v7.0.0-pre3.txt ``` You should see the following if the verification was successful: ``` bash gpg: Signature made Fri 13 Sep 2024 08:06:52 AM -03 gpg: using RSA key 44F0AAEB77F373747E3D5444885822EED3A26A6D gpg: Good signature from "greenart7c3 <greenart7c3@proton.me>" ``` That will verify the signature on the main manifest page which ensures integrity and authenticity of the binaries you've downloaded locally. Next, depending on your operating system you should then re-calculate the sha256 sum of the binary, and compare that with the following hashes: ``` bash cat manifest-v7.0.0-pre3.txt ``` One can use the `shasum -a 256 <file name here>` tool in order to re-compute the `sha256` hash of the target binary for your operating system. The produced hash should be compared with the hashes listed above and they should match exactly.