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Overview
Signal Android is the official Android application for Signal. It handles messaging, voice and video calls, media, and other communication features while emphasizing privacy-preserving technology. The repository also documents reproducible builds.
Features and best fit
Based on official documentation; not hands-on tested · Content checked:
Key features
Provide messaging and voice/video calls on Android
The client combines everyday messaging with high-fidelity voice and video communication.
Sources: [2]
Verify distributed binaries through reproducible builds
The project documents a Docker-based process for building a tagged release and comparing generated artifacts with APKs installed on a device.
Sources: [3]
Best fit
Before adoption
Build and verification prerequisites are substantial
The reproducible-build guide requires Git, Docker, Python, uv, adb, bundletool, and Android SDK tooling.
Sources: [3]
Review AGPL-3.0 and cryptography-related obligations
The README explicitly includes the AGPLv3 license and a cryptography notice, so redistribution and jurisdiction-specific requirements need review.
Sources: [2]
Official sources
- [1]signalapp/Signal-Android repository(2026-09-30)
- [2]Signal Android README(2026-09-30)
- [3]Signal reproducible builds guide(2026-09-30)
- [4]Signal Android v8.28.4 release(2026-09-30)
Supplemental curator note
This is Signal's official Android client. It should be approached as a large security-sensitive application covering encrypted messaging, calls, media, push delivery, and Android platform integration rather than as a simple chat UI.
Try it in 3 steps
- 1
Get the source
git clone --depth 1 https://github.com/signalapp/Signal-Android.git - 2
Enter the repository
cd Signal-Android - 3
Check the official steps
Continue with the commands in the README Installation, Quick Start, or Getting Started section.
find . -maxdepth 1 -iname 'README*' -exec sed -n '1,220p' {} \; -quit
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29,407 Stars
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