Native Android messaging app that works without internet - send encrypted messages via Bluetooth LE, WiFi, LoRa radio, or mesh networks using Reticulum protocol

When cell towers fail and internet goes dark, your communication dies. Columba solves this with true off-grid messaging that works through Bluetooth LE, WiFi, LoRa radio, or mesh networks. Built on the Reticulum protocol, it creates resilient communication networks that route around damage and censorship.

This isn’t just another messaging app - it’s a complete decentralized communication stack in your pocket. Generate cryptographic identities on-device, share location data over encrypted channels, browse NomadNet pages, and even make voice calls through LXST. The Material Design 3 interface makes mesh networking as simple as WhatsApp, while features like offline map downloads, QR code identity sharing, and multi-identity management show serious attention to real-world usage.

Perfect for emergency responders, privacy advocates, rural communities, or anyone who needs communication that can’t be switched off. With 657 stars and active development, the project is gaining momentum among developers building truly resilient infrastructure. Download the APK and join a network that gets stronger as it grows.

⭐ Stars: 657
💻 Language: Kotlin
🔗 Repository: torlando-tech/columba