Postr

A deliberately small Nostr composer for Android. Write a note, sign it with Amber, and send it to your relays. Post. That's all. Private keys stay in Amber.

Published Apps

Postr Postr does one job: compose a kind-1 note, sign it with Amber, and send it to your relays. Its durable outbox survives airplane mode, process death, and unreliable relays. Postr verifies the exact signed event by reading it back, and every retry reuses that event so it cannot create a duplicate note. Private keys stay in Amber. Postr asks only to sign kind-1 notes and file-scoped Blossom upload authorizations. It has no feed, analytics, ads, or private-key storage.

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