OSHI Mesh

Calls that stay in sync: latency can no longer pile up. If the line gets congested, OSHI now drops old audio instead of falling behind by seconds.

OSHI is a free, open-source encrypted messenger built in Switzerland for people who refuse to depend on cell towers, big tech, or anyone's permission to communicate. Whether you're hiking off-grid, traveling abroad, preparing for an emergency, or just done with surveillance — OSHI keeps you connected, oriented, and informed without ever needing a signal.

SURVIVAL-READY — OFFLINE

• Mesh networking via Bluetooth and Wi-Fi Direct — message anyone within range, no internet, no SIM, no cell tower
• Multi-hop relay so messages travel through nearby OSHI users
• Built-in offline maps for 42 European countries + cities worldwide
• Turn-by-turn navigation with car, walking, and cycling modes
• 12 POI categories: pharmacies, hospitals, water, fuel, food, ATMs, shelters, transport
• On-device AI assistant (Apple Intelligence) — ask anything, no servers, no leaks
• Auto-downloads your region on first launch so you're prepared before you need it

PRIVACY FIRST

• End-to-end encryption with the Double Ratchet (Signal Protocol)
• AES-256-GCM authenticated encryption on every message
• No phone number required — your identity is your cryptographic key
• No email, no account, no central server can ever see who you talk to
• Zero metadata collection — we don't even know you exist

ON-DEVICE AI

• Full conversational AI powered by Apple Intelligence
• 100% on-device — no requests leave your phone
• Multi-turn memory, contextual answers, suggestion chips
• Available on iPhone 15 Pro and newer (iOS 26+)

ENCRYPTED VOICE & VIDEO CALLS

• Voice and video calls with FaceTime-grade quality (AAC-ELD)
• End-to-end encrypted with AES-256-GCM
• Forward Error Correction for clean audio over weak links
• Peer-to-peer when possible, relayed when not

COVERT COMMUNICATION

• 6 steganographic channels to bypass censorship
• Image steganography (LSB embedding)
• Text steganography (zero-width, homoglyphs)
• Web mimicry, DNS tunneling, domain fronting
• Automatic channel selection based on network conditions

MORE

• Group chats with admin controls
• Disappearing messages with custom timers
• Voice effects to mask identity
• Bot platform (Telegram-style)
• 16 languages, dark mode
• Fully open source on GitHub — audit it yourself

OSHI is built for hikers, journalists, activists, travelers, preppers, and anyone who believes private communication is a right, not a feature. Download it now — and the next time the signal drops, the network goes down, or the borders close, you'll already be ready.