Extera

A FluffyChat fork on steroids, aimed at adding more features.

Features

🗨️ Core messaging

• 📨 Send/receive all kinds of messages: text, images, videos, voice, files, polls...
• 📍 Geolocation sharing with in-app map preview
• 🔔 Push notifications
• 🛠️ Room moderation
• 😄 Custom emotes and stickers
• 🌌 Spaces
• 📞 1-to-1 voice/video calls
• ☎️ Jitsi-powered group calls

🔒 Security and privacy

• 🔑 E2EE encryption using Matrix's libvodozemac
• 💼 Encrypted key backup
• ✅ Emoji verification and cross-signing

🪟 UI and design

• 🌙 Dark mode
• 🌑 AMOLED (pitch black) mode
• 🎨 Customisable seed color & color scheme
• 📱 Material You design, partially inspired by Material 3 Expressive

🧰 Moderation

• 🔨 Feature-rich group moderation (all Matrix features)
• 🔍 Redacted message recovery (for Synapse admins)

✨ Extera Exclusives

• 🌐 Built-in message translation (toggleable)
• 🖌️ Built-in image editor
• 🧰 More expressive profiles: "About", banner, Rich Presence (MSC4320)

Building

Prerequisites

Before building, you should have:

1. Flutter SDK installed
2. matrix-dart-sdk in the same directory as Extera

Setup

The matrix dependency can be configured in two ways:

Way 1: Directory-based (recommended when developing both app & sdk) Make sure that you have matrix-dart-sdk cloned in the same parent directory.

$ ls
Extera    matrix-dart-sdk

Option 2: Git reference Make sure that pubspec.yaml has a Git reference like this:

matrix:
  git:
    url: https://github.com/ExteraApp/matrix-dart-sdk.git
    ref: main

Build Commands

Platform-specific build scripts are available in the scripts/ directory:

• ./scripts/build-appimage.sh - AppImage (Linux)
• ./scripts/build-linux.sh - Linux (Run only after build-appimage.sh)

License

This project is licensed under the AGPL-3.0 License. See the LICENSE file for details.

Resources

• Matrix.org - The Matrix protocol specification
• FluffyChat - The original FluffyChat project
• matrix-dart-sdk - Dart SDK for Matrix