Silouder is a privacy-first, zero-cloud Android communicator engineered for emergency communication, remote expeditions, and disaster zones. It dispatches encrypted messages seamlessly across Bluetooth P2P, LAN sockets, LoRa Meshtastic radio, and Tor onion circuits without cellular towers or internet.
Silouder isn't just for extreme survivalists. It solves common, everyday communication frustrations whenever cell towers are congested, roaming is expensive, or signals drop.
When 50,000+ people crowd a concert or match, cellular data grinds to a halt. Silouder bypasses overloaded cell towers by hopping directly between nearby phones via Bluetooth P2P so you never lose your friends in the crowd.
Stay coordinated in state parks, remote valleys, and mountain trails where mobile coverage drops to zero. Pair with an external LoRa radio for multi-mile range or use direct Bluetooth between group members without satellite fees.
Commuting deep underground in subway trains or cruising at 35,000 feet in airplane mode? With Bluetooth or local Wi-Fi enabled, keep texting travel buddies sitting carriages or rows away without paying for expensive in-flight Wi-Fi.
When storms knock out broadband cables or your internet provider goes down, Silouder leverages your battery-backed home router or phone hotspot to maintain instant messaging across rooms, floors, and neighboring apartments.
Chat with classmates in lecture halls or coworkers in open offices without logging into centralized chat servers. Messages are encrypted with AES-256-GCM and never leave your local physical environment.
Arriving at foreign airports or exploring historical city centers without paying for international roaming data packs? Keep your travel group connected offline at hotels, museums, and landmarks completely free.
Silouder does not rely on a single communication channel. An intelligent transport router continuously tests available links and routes encrypted packets across the most efficient path.
Briar-inspired proximity discovery and offline peer-to-peer sync. Exchanges message vectors when physical peers are within Bluetooth range without ever touching the internet.
Direct peer sockets over WiFi, ad-hoc hotspots, or reachable local IPs on port 8888. Allows ultra-fast high-throughput sync across local networks without central chat servers.
Integrates with external SX1262 LoRa hardware modems via BLE. Supports long-range sub-GHz packet broadcast, multi-hop mesh repeaters, and packet MTU fragmentation.
End-to-end anonymous circuits over Tor. Deterministically derives v3 onion addresses from node identity keys, providing censorship-resistant routing when the global web is censored.
Every byte transmitted by Silouder is encrypted locally before ever touching a radio or socket transport. Even intermediate mesh repeater nodes only see ciphertext.
Authenticated encryption with associated data provides both confidentiality and cryptographic tamper protection.
Tamper-proof packet verification ensures data cannot be forged or altered in transit by rogue mesh repeaters.
Identities are generated entirely offline on your device using cryptographic entropy. No phone number, email, or account needed.
No analytics, no trackers, no Google Play Services dependency. 100% compliant with F-Droid and GPL-3.0 standards.
Install the official verified production release APK directly from GitHub Releases. Fully standalone, zero Google Play Services required.
Silouder is 100% Free & Open Source Software (GNU GPL-3.0) with zero tracking, zero Google Play Services dependencies, and zero non-free binary blobs. Inclusion in the official F-Droid catalog is currently in progress. While the automated build pipeline processes the submission, you can immediately install the official signed release APK above.
Download silouder_release_v1.apk directly to your Android device or transfer via USB.
If prompted by Android, enable "Install unknown apps" for your browser or file manager.
Open Silouder. Your cryptographic keys and node ID are generated entirely offline upon launch.