If you want to be part of our beta program, please visit the Play Store subscription form. F-Droid users do not need to do anything but enabling “Unstable updates” in the F-Droid client.
The source for Silence is open, so that anyone can easily verify it works as advertised. It is licensed GPLv3 and will always be free.
Silence works like any other SMS application. There's nothing to sign up for and no new service your friends need to join.
Silence communicates using encrypted SMS messages. No servers or internet connection required.
Silence provides end-to-end encryption for your messages using the painstakingly engineered Axolotl encryption protocol.
All messages are encrypted locally, so if your phone is lost or stolen, your messages are protected.
Silence is Free and Open Source, enabling anyone to verify its security by auditing the code.
Silence is powered by your donations and we accept bitcoins. This will help us to pay various costs (web hosting, domain name, etc.).
Our Bitcoin address is
Silence does not collect or transmit any personal information. We require the following permissions:
INTERNET: This permission is required so the app can transfer data to/from cell service providers to enable MMS. It it not used for any other purpose.
READ_CONTACTS: This permission is required so the app can suggest contacts to the user as they type, as well as display contact information next to message threads. This information is never transmitted off the device.
READ_PHONE_STATE: This permission is required to get the current phone number. This is used for some dual-sim functionality and to ensure sending messages to the current number, from the current number, is handled correctly. This information is never transmitted off the device.