Amber
Android Nostr event signer designed to keep signing keys in a dedicated app, with NIP-46 and NIP-55 integration documented by the project.
How it started
Launched
· first GitHub release, v0.0.1 · Source (opens in a new tab)
Why it was built
The README states the rationale: 'Private keys should be exposed to as few systems as possible as each system adds to the attack surface.' Amber lets a phone act as a NIP-46 signing device so other apps never hold the nsec. · Source (opens in a new tab)
Milestones
First release, v0.0.1 · Source (opens in a new tab)
Received an OpenSats grant · Source (opens in a new tab)
OpenSats announced long-term support for the developer, funding Amber and Citrine · Source (opens in a new tab)
Release history
Repository facts collected .
Status evidence
Checked 2026-09-22: repository is not archived; reviewed published releases v6.6.4 and v6.6.5. Active describes observed development, not availability, stability or security. The official repository is used as the project website; no separate product domain was inferred. Maintainer is qualified from repository ownership, developer-owned continued-development statement and release work, not a single commit; no founder title verified. Re-verified 2026-10-04: the repository is still not archived, with its most recent public push on 2026-10-03.
Latest recorded update: · Amber v6.6.5 separates backup encryption from remembered app permissions (opens in a new tab)
Last checked: . Status reflects the cited evidence at that time.
Directory checked: .
Sources
- Official README (opens in a new tab)
- Repository metadata checked 2026-09-08 (opens in a new tab)
- Maintenance commit 2026-09-04 (opens in a new tab)
- Public maintainer profile (opens in a new tab)
- Developer-owned site source solicits support for continued Amber development (opens in a new tab)
- Release v6.6.5, published 2026-09-21 (opens in a new tab)
- Release v6.6.4, published 2026-09-14 (opens in a new tab)
- Repository metadata re-checked 2026-10-04 (opens in a new tab)
- Release v6.6.6, published 2026-09-28 (opens in a new tab)
People
Founder: not verified.
greenart7c3
Maintainer
Your keys, your data, your media. Three open-source Android apps from greenart7c3 for complete Nostr self-sovereignty.Related ecosystem news
- · Amber v6.6.5 separates backup encryption from remembered app permissions (opens in a new tab)
- · Amber v6.6.4 fixes a Tor startup clearnet race (opens in a new tab)
- · Amber v6.6.1 fixes permission parsing and rejected request matching (opens in a new tab)
- · Amber v6.6.0 adds permission pre-approval controls (opens in a new tab)
Related security reports
- · Amber v6.6.5: dedicated encryption boundary for relay backups (opens in a new tab)
- · Amber v6.6.4: Tor startup clearnet race fixed (opens in a new tab)
- · Amber v6.6.0: biometric setting change requires authentication (opens in a new tab)
- · Baseline: Amber advisories and v6.5.0 fixes predate this fortnight (opens in a new tab)
Similar projects
Other projects in the same category, ranked by the repository topics they share.
- SignerActive
Nostr signer browser extension, distributed from its repository with no separate product website.
- SignerUnknown Status could not be verified from the evidence listed.
Browser-based Nostr key manager served at use.nsec.app, whose noauth repository showed no public activity in the sixteen months before this check.
