CustID is a mobile identity vault built on Nostr and the SISTR protocol.

Governments everywhere are rolling out national e-ID — the EUDI Wallet
across the EU, Switzerland's e-ID, and more. Those wallets can work
well, yet your recognized identity is still issued, attested and
revocable by an authority. CustID flips that: your identity simply IS
your key, held on your device, and no one can take it from you.

One app to hold your identities, memberships, badges and passes —
offline, without Google.

Identity vault: multiple identities, keys protected by the
hardware-backed Android Keystore, never held in plaintext during
normal operation; moving or backing up an identity only ever exports
an encrypted ncryptsec, never a raw key.
Nostr signer (NIP-46 bunker): sign for any NIP-46 compatible client
remotely; your key never leaves your device.
No Google: no Firebase Cloud Messaging, no Google Play Services.
Distributed via Zapstore only.
NFC challenge-response: answer access-control challenges with a tap
(doors, gates, event ticketing, ...).
QR code proofs: scan or present signed proofs as an NFC fallback.
Zero-knowledge proofs: planned in the SISTR project, for
privacy-preserving identity claims.

👷 MVP public beta.
⚠ Please backup your keys and don't use CustID for critical applications until a stable release is published.