github.com/signalapp/Signal-Android ↗

About signalapp/Signal-Android

Signal Android is the open-source implementation of Signal, a widely-used encrypted messaging application for Android. The app enables users to send text messages, share media, and participate in high-definition voice and video calls using internet connectivity instead of traditional SMS. All communication is protected by Signal's privacy-preserving encryption technology, which operates by default without requiring users to configure additional security settings.

The project is written in Kotlin and serves millions of active users globally. It is available both through the Google Play Store and as direct APK downloads from Signal's official website. The codebase welcomes community contributions in the form of bug reports, translations, and code improvements, with the project maintainers encouraging discussion of larger feature proposals on the community forum before implementation begins.

Signal Android is part of a broader ecosystem that includes companion applications for iOS and desktop platforms, allowing users to maintain encrypted communication across multiple devices. The project is distributed under the GNU AGPLv3 license and contains cryptographic software subject to export regulations.