MeshChat: Offline Mesh Chat

No internet. No signal. Keep talking.

MeshChat is an offline messenger for people who are close to each other. Messages go straight from phone to phone over Bluetooth and Wi-Fi, so you can chat without mobile data, a SIM card, an account or a server. The app is free to download.

Every phone running MeshChat also passes messages on to the next phone. A message can hop across several devices and reach people who are outside your direct range.

WHAT YOU CAN DO

• Chat offline: send text messages to people nearby with no internet and no mobile signal

• Public channel: talk with everyone around you, in a crowd, a camp or a neighbourhood

• Private messages: end-to-end encrypted, with a delivery status (pending, delivered, failed)

• Multi-hop relay: messages pass through other MeshChat phones to travel farther

• Retry queue: a message that cannot be delivered right away waits and is sent when someone comes into range

• Background mode: keep receiving messages and alerts while the app runs in the background

• No sign-up: no phone number, no email, no account

• Battery-aware scanning that adjusts to your battery level

• English and Turkish interface

PREMIUM (one-time purchase, no subscription)

• Emergency broadcast with optional GPS location, clearly marked on receiving phones

• Photo sharing

• Custom display name

• No ads

WHEN IT HELPS

• Earthquakes, floods, storms and power cuts, when mobile networks stop working

• Hiking, camping, boating and other places with no coverage

• Concerts, festivals, matches and crowded events where the network is overloaded

• Flights and trips abroad, without roaming or mobile data

• Schools, campuses, fairs and group trips

PRIVACY AND SECURITY

• Private messages are end-to-end encrypted (AES-256-GCM) and use a fresh key for every connection (forward secrecy)

• Every message is digitally signed by its sender, so changes are detected

• Your messages are not sent to any server and no account is created

• Public channel messages can be read by anyone nearby, so send personal details as private messages

HOW TO START

1. Allow the permissions the app asks for (Bluetooth, nearby devices, notifications).

2. Tap Start to turn on the mesh.

3. Ask the people near you to open MeshChat too. They show up automatically.

GOOD TO KNOW

• MeshChat does not replace 112, 911 or other emergency services.

• Range depends on the phones, the surroundings and obstacles. Delivery is not guaranteed.

• To reach farther, the phones in between must also run MeshChat.

• Continuous scanning uses battery.

• Showing a location on the map needs map data to be downloaded. Messaging itself works without internet.

• The free version shows ads. Premium removes them.