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A private messenger for Android.
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.tx Updated translations
apntool update APN list, fix MMSC issues
artwork migrate AlertDialog to material-dialogs
assets Update APN database from latest CM list
gradle/wrapper Gradle wrapper, all.
jni Resolve service deadlock issue
libs Resolve service deadlock issue
res Updated language translations
src Add Slovakia to list of 6-digit shortcodes that libphonenumber misses
test Fix broken test
.gitattributes materialize conversation item indicators
.gitignore Support for Signal calls.
AndroidManifest.xml Bump version to 3.10.0 Some clarifications for Expand
LICENSE Initial Project Import
NOTICE Initial Project Import Fix google play store badge link in
build.gradle Revert "Update libphonennumber for new shortcode metadata"
gradlew gradle wrapper 1.10, android plugin 0.8, android support 19.0.1 //
gradlew.bat gradle wrapper 1.10, android plugin 0.8, android support 19.0.1 // Fix the connectedCheck build target add dev buildType refactor proguard rules Use Glide for loading part thumbnails refactor proguard rules refactor proguard rules Support for Signal calls. refactor proguard rules Add proguard rule for ShortcutBadger now that they use reflection. Support for Signal calls. refactor proguard rules refactor proguard rules refactor proguard rules
proguard.cfg Switch RedPhone view<->service interaction to use event bus
settings.gradle Break out libtextsecure

Signal Android

Signal is a messaging app for simple private communication with friends.

Signal uses your phone's data connection (WiFi/3G/4G) to communicate securely, optionally supports plain SMS/MMS to function as a unified messenger, and can also encrypt the stored messages on your phone.

Currently available on the Play store.

Get it on Google Play

Contributing Bug reports

We use GitHub for bug tracking. Please search the existing issues for your bug and create a new one if the issue is not yet tracked!

Joining the Beta

Want to live life on the bleeding edge and help out with testing?

You can subscribe to Signal Android Beta releases here:

If you're interested in a life of peace and tranquility, stick with the standard releases.

Contributing Translations

Interested in helping to translate Signal? Contribute here:

Contributing Code

Instructions on how to setup your development environment and build Signal can be found in

If you're new to the Signal codebase, we recommend going through our issues and picking out a simple bug to fix (check the "easy" label in our issues) in order to get yourself familiar.

For larger changes and feature ideas, we ask that you propose it on the mailing list for a high-level discussion before implementation.

This repository is set up with BitHub, so you can make money for committing to Signal. The current BitHub price for an accepted pull request is:

Current BitHub Price

Contributing Ideas

Have something you want to say about Open Whisper Systems projects or want to be part of the conversation? Get involved in the mailing list!

Contributing Funds


You can add funds to BitHub to directly help further development efforts.



For troubleshooting and questions, please visit our support center!


Looking for documentation? Check out the wiki!

Legal things

Cryptography Notice

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 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 2011 Whisper Systems

Copyright 2013-2016 Open Whisper Systems

Licensed under the GPLv3:

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