HOP: Offline Messenger

HOP is a free messenger that works with no internet and no cell signal. Messages hop from phone to phone and travel further than any single device can reach.

Phones with HOP connect on their own over Bluetooth and Wi‑Fi — no towers, routers or carrier. If the recipient is far away, the message travels through other people’s phones, hop by hop. With no route, it waits and sends itself when one appears.

WHERE IT HELPS
• Concerts and festivals — when thousands of phones jam the network
• Matches and stadiums — find your group after half-time
• Planes — in airplane mode, turn Wi‑Fi back on and text fellow passengers
• Mountains, trails, sailing — valleys with no coverage
• Outages, storms, blackouts
• Camps and school trips

HIGHLIGHTS
• SOS: hold the button for 2 seconds — the alarm reaches every HOP phone nearby, across many hops too; with your GPS position if you like (GPS works without internet)
• A compass to the person calling for help — arrow and distance
• Network radar: see who is right next to you and who is a few hops away
• Friends and strangers — add friends by scanning the QR code of the person next to you
• “Hide me from strangers” — strangers see only a dot
• Announcements for everyone nearby
• Photos, replies, disappearing messages
• Optional internet relay — to reach friends far away
• 8 languages

PRIVACY
End-to-end encryption (X25519, ChaCha20-Poly1305, Ed25519 signatures). Keys are created on your phone. No phone number, e‑mail, password or account. No ads, no tracking. Phones on the way and the relay can’t read your messages — they only see sender and recipient IDs, time and size.

HOP does not replace the emergency number. If you have signal, call 112 (or your local emergency number).

The more people around you have HOP, the further the network reaches — tell your friends.