OTPPhone.

[ END-TO-END ENCRYPTED · ANDROID ]

Encrypted messaging with Bluetooth one-time-pad key exchange. Message content is end-to-end encrypted, the relay only forwards it.

Download APK

1. File Details

2. Instructions

  1. Tap Download APK above.
  2. Open the downloaded file. If prompted, allow your browser to install unknown apps.
  3. If you see "this file may harm your device", that’s the standard warning for apps installed outside Google Play, tap Download anyway/Install.
  4. Open OTPPhone and share your User ID to add contacts.

3. Verification

Verify the download integrity (optional): on a computer run
sha256sum otpphone.apk
and check it matches the hash above.