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A private messenger for Android.
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.github Update the issue template. Mar 31, 2018
.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
artwork Change the app icon Mar 14, 2017
assets Convert emoji to webp. Jun 17, 2019
buildSrc Gradle witness - Do not hide resolution errors. May 30, 2019
gradle/wrapper Gradle/Gradlew/AndroidGradlePlugin update. Mar 18, 2019
jni 64-bit native utils. Mar 21, 2019
libs Bring Gradle Witness into repo. May 30, 2019
protobuf Add sticker support. May 30, 2019
res Updated language translations. Jul 3, 2019
src/org/thoughtcrime/securesms Fix incorrect EditorModel being restored. Jul 3, 2019
test Convert to AndroidX. Jun 17, 2019
website Fix tap-to-upgrade on website releases. Jan 14, 2019
.gitattributes materialize conversation item indicators Nov 18, 2014
.gitignore Lint. May 10, 2019
AndroidManifest.xml Fix audio playback on API 28 devices. Jun 30, 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
build.gradle Bump version to 4.43.8 Jul 3, 2019 Convert to AndroidX. Jun 17, 2019
gradlew Gradle/Gradlew/AndroidGradlePlugin update. Mar 18, 2019
gradlew.bat Gradle/Gradlew/AndroidGradlePlugin update. Mar 18, 2019
lint-baseline.xml Lint - baseline of errors. May 28, 2019
lint.xml Lint. May 10, 2019
pkcs11.config Update release config Oct 30, 2018 Giphy integration Oct 18, 2016 Fix the faulty tests in Jan 12, 2017 refactor proguard rules Apr 2, 2015 Convert vCard attachments to Shared Contacts. May 21, 2018 FCM improvements. Feb 15, 2019 Update to glide 4.x Oct 12, 2017 refactor proguard rules Apr 2, 2015 refactor proguard rules Apr 2, 2015 Add proguard config for klinker library May 12, 2017 Add splash screen for setting profiles Sep 4, 2017 Support for Signal calls. Sep 30, 2015 Join recipient preferences into thread query for faster lookup Aug 28, 2017 refactor proguard rules Apr 2, 2015 Add proguard rule for ShortcutBadger now that they use reflection. May 8, 2015 Migrate from SQLite and ciphertext blobs to SQLCipher + KeyStore Jan 31, 2018 refactor proguard rules Apr 2, 2015 refactor proguard rules Apr 2, 2015 Beta support for webrtc video and voice calling Feb 1, 2017
proguard.cfg Switch RedPhone view<->service interaction to use event bus Nov 5, 2015

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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