http://anonymous.i2p
Manage multiple keypairs (generate or import from gpg / OpenKeychain), keep a roster of contacts' public keys, encrypt/decrypt and sign/verify both text and files, exchange keys via paste, file, or QR. 8.5 MB. Built on Bouncy Castle — no network, no keyservers, no auto-sync. [ Download ] [GPL-3] [no network permission] [panic-aware] [QR import / export] Anon Mail Android 6.0+ · v0.2.0 IMAP/SMTP client with embedded Tor (no Orbot needed) and inline OpenPGP .