Encrypted SMS for Android. X25519 + ML-KEM hybrid key exchange, QR-code pairing, and a share-my-APK feature for handing it phone-to-phone. Encryption on/off switch on the Keys tab. v20 adds the gated bang (TNT) test payload.
cypher-sms-v20-2026-11-07.apk · 83.2 MB · built 2026-11-07