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Greyson Parrelli 7e64d57ba8 Bump version to 5.2.3 4 days ago
.github Update issue template. 5 days ago
apntool update APN list, fix MMSC issues 5 years ago
app Bump version to 5.2.3 4 days ago
buildSrc Run witness checksums in task and only when compiling. 1 month ago
core-util Prompt to confirm number before SMS or call. 1 week ago
gradle/wrapper Update gradle plugin to 4.1.0, gradle to 6.5. 2 months ago
libsignal/service Bump signal-client-java version to 0.1.5 4 days ago
lintchecks Create a core-util module with some common utilities. 1 month ago
paging Custom streaming video muxer. 2 weeks ago
reproducible-builds Complete update of reproducible build instructions 1 month ago
video Custom streaming video muxer. 2 weeks ago
.gitattributes materialize conversation item indicators 6 years ago
.gitignore Allow more control over debug and staging signing. 2 months ago Update donation link in contribution instructions. 4 months ago
LICENSE Initial Project Import 9 years ago
NOTICE Initial Project Import 9 years ago Update copyright in 7 months ago
build.gradle Use our own homemade paging library for conversation paging. 1 month ago
flavors.gradle Use our own homemade paging library for conversation paging. 1 month ago Convert to AndroidX. 1 year ago
gradlew Update gradle plugin to 4.1.0, gradle to 6.5. 2 months ago
gradlew.bat Update gradle plugin to 4.1.0, gradle to 6.5. 2 months ago
pkcs11.config Update release config 2 years ago
settings.gradle Custom streaming video muxer. 2 weeks ago

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

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 2013-2020 Signal

Licensed under the GPLv3:

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