twonly

This repository contains the complete source code of the twonly apps.

Features

• Offer a Snapchat™ like experience
• End-to-End encryption using the Signal Protocol
• twonly is Open Source and can be downloaded directly from GitHub
• Developed by humans not by AI or Vibe Coding
• No email or phone number required to register
• Privacy friendly - Everything is stored on the device
• The backend is hosted exclusively in Europe

Planned

• For Android: Optional support for UnifiedPush
• For Android: Reproducible Builds
• Implementing Sealed Sender to minimize metadata

Security Issues

If you discover a security issue in twonly, please adhere to the coordinated vulnerability disclosure model. Please send us your report to [email protected]. We also offer for critical security issues a small bug bounties, but we can not guarantee a bounty currently :/

Development

Setup Instructions (macOS)

Building

Some dependencies are downloaded directly from the source as there are some new changes which are not yet published on pub.dev or because they require some special installation.

git submodule update --init --recursive

cd dependencies/flutter_zxing
git submodule update --init --recursive
./scripts/update_ios_macos_src.s

Debugging files

run-as eu.twonly.testing ls /data/user/0/eu.twonly.testing/

Signing Keys

When you download the app via GitHub you can verify the signing keys using for example the AppVerifyer and the following SHA-256 fingerprint of the signing certificate.

eu.twonly E3:C4:4D:56:8C:67:F9:32:AC:8C:33:90:99:8A:B9:5E:E8:FF:2D:7A:07:3C:24:E3:66:77:93:E6:EA:CD:77:0A

License

This project is licensed under the GNU AGPL 3.0 license.