An application that provides encrypted voice calls for Android.

RedPhone is an application that enables encrypted voice communication between RedPhone users. RedPhone integrates with the system dialer to provide a frictionless call experience, but uses ZRTP to setup an encrypted VoIP channel for the actual call. RedPhone was designed specifically for mobile devices, using audio codecs and buffer algorithms tuned to the characteristics of mobile networks, and using push notifications to maximally preserve your device's battery life while still remaining responsive.

Currently available on the Play store.

Have a bug? Please create an issue here on GitHub!

https://github.com/WhisperSystems/RedPhone/issues

Looking for documentation? Check out the wiki!

https://github.com/WhisperSystems/RedPhone/wiki

Have a question? Ask on our mailing list!

[email protected]

https://lists.riseup.net/www/info/whispersystems

Interested in helping to translate RedPhone? Contribute here:

https://www.transifex.com/projects/p/redphone/

This distribution includes cryptographic software. The country in which you currently reside may have restrictions on the import, possession, use, and/or re-export to another country, of encryption software. BEFORE using any encryption software, please check your country's laws, regulations and policies concerning the import, possession, or use, and re-export of encryption software, to see if this is permitted. See http://www.wassenaar.org/ for more information.

The U.S. Government Department of Commerce, Bureau of Industry and Security (BIS), has classified this software as Export Commodity Control Number (ECCN) 5D002.C.1, which includes information security software using or performing cryptographic functions with asymmetric algorithms. The form and manner of this distribution makes it eligible for export under the License Exception ENC Technology Software Unrestricted (TSU) exception (see the BIS Export Administration Regulations, Section 740.13) for both object code and source code.

Copyright 2012 Whisper Systems

Licensed under the GPLv3: http://www.gnu.org/licenses/gpl-3.0.html