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A private messenger for Android.
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.github Create android.yml running qa task. Nov 13, 2019
.tx Updated language translations. Mar 3, 2019
apkdiff Ignore resources.arsc in May 11, 2019
apntool update APN list, fix MMSC issues Mar 12, 2015
app Bump version to 4.51.6 Dec 6, 2019
artwork Change the app icon Mar 14, 2017
assets Update emoji. Jul 3, 2019
buildSrc Move libsignal-service-java into this repo. Dec 4, 2019
gradle/wrapper Upgrade Gradle to 5.6.2 and AGP to 3.5.1 Oct 18, 2019
jni Transcode video during attachment upload. Jul 31, 2019
libs Transcode video during attachment upload. Jul 31, 2019
libsignal/service Prevent possible UUID-only recipient creations. Dec 5, 2019
protobuf Add internal pre-alpha support for receiving reactions. Dec 4, 2019
res Updated language translations. Dec 6, 2019
src/org/thoughtcrime/securesms Fix reactions scrubber positioning on vertically split multiscreen. Dec 6, 2019
staging/res/values English staging app name. Nov 9, 2019
test Put safeguards around Recipient creation in the IdentityStore. Dec 5, 2019
website Fix tap-to-upgrade on website releases. Jan 14, 2019
.gitattributes materialize conversation item indicators Nov 18, 2014
.gitignore Apply new Signal icons and color palette. Oct 18, 2019
AndroidManifest.xml Fix issue where unlocking would dismiss MainActivity. Dec 4, 2019 Remove reference to Pixelapse in Jul 3, 2018 Update the Android Transifex links in Aug 30, 2018
Dockerfile Updated Gradle to 5.1 Jan 29, 2019
LICENSE Initial Project Import Dec 20, 2011
NOTICE Initial Project Import Dec 20, 2011 Changed URL of the user forum. Sep 27, 2018 Bring the Reproducible Builds instructions and script into repo. May 10, 2019 Convert to AndroidX. Jun 17, 2019
gradlew Upgrade Gradle to 5.6.2 and AGP to 3.5.1 Oct 18, 2019
gradlew.bat Upgrade Gradle to 5.6.2 and AGP to 3.5.1 Oct 18, 2019
main.gradle Move libsignal-service-java into this repo. Dec 4, 2019
pkcs11.config Update release config Oct 30, 2018
settings.gradle Move libsignal-service-java into this repo. Dec 4, 2019

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. Also please have a look at the, that might answer some of your questions.

For larger changes and feature ideas, we ask that you propose it on the unofficial Community Forum for a high-level discussion with the wider community before implementation.

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 community forum.



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 2013-2017 Open Whisper Systems

Licensed under the GPLv3:

Google Play and the Google Play logo are trademarks of Google Inc.

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