🌿 GreenChat

A Decentralized Offline Messaging App
Communication Beyond Connectivity.

📘 Project Overview:

GreenChat is an innovative offline messaging application that allows users to communicate with people nearby without any need for internet, SIM card, or mobile network. It uses Bluetooth-based mesh networking to build a fully decentralized, peer-to-peer communication system — perfect for areas with limited or no internet access.

Whether you’re on a mountain, in a rural village, inside a large university campus, or during an emergency like a natural disaster — GreenChat keeps you connected.

🔍 Why GreenChat?

In today’s hyper-connected world, we often take internet access for granted. But millions still live in areas with poor connectivity — and even urban networks can fail during crises. GreenChat is built to ensure freedom of communication, no matter the environment. It's more than an app — it’s a statement of privacy, resilience, and decentralization.

🔐 Key Features:

• ✅ No Internet or SIM Required
  Communicate entirely via Bluetooth mesh. No servers involved.

• 📡 Decentralized Mesh Networking
  Devices connect directly or through relays — no central control.

• 🔒 End-to-End Encryption
  All messages are encrypted and private — even system-level can’t read them.

• 🛡️ Password-Protected Channels
  Create private, secure groups with passkey access.

• 📥 Store-and-Forward
  Messages to offline users are stored and delivered when they reconnect nearby.

• 📲 Lightweight & Intuitive UI
  Fast, smooth performance — works on devices running Android 8 to Android 15+.

🎯 Use Case Scenarios:

• 🧑‍🎓 Campuses & Events: Chat with friends or attendees even if mobile data is slow or jammed.

• 🏞️ Rural & Remote Areas: Perfect for communities with poor or no internet access.

• 🌪️ Disaster Situations: Stay connected when networks fail.

• 🕵️ Privacy-Lovers: Communicate peer-to-peer, without central servers or cloud storage.

💡 Tech Stack:

• Platform: Android

• Architecture: Bluetooth LE + Mesh Network

• Encryption: Custom E2E encryption logic

• Offline Mode: Fully supported (no background internet fallback)

• Minimum SDK: Android 8

• Maximum SDK: Android 15+

👨‍💻 Developer Note:

"I built GreenChat as a passion project to help people communicate freely and securely, even when disconnected from the world. It’s a tool for resilience, privacy, and human connection."
— Muntasir Mubin, Developer & Founder of WebDextro Ltd.

📅 Project Status:

🛠️ In Beta Development

🔗 Source Code (Open-source):

🚀 Get Involved:

Want to contribute, test, or support the project?
Contact us at: info@webdextro.org