Flight Mode Chat

Encrypted chat with people nearby over Bluetooth, with no internet or cell signal.

Flight Mode Chat runs on iPhone and iPad. The app interface is in English.

How to chat without internet on iPhone

No Wi-Fi, no signal, still need to message someone nearby? What iPhone can do on its own, where Bluetooth chat apps fit and their real limits.

Can you text on a plane without Wi-Fi?

SMS won't send at 10,000 metres, and in-flight Wi-Fi costs money. What does work: free messaging plans, and Bluetooth chat with people on the same flight.

Bluetooth chat on iPhone: how it works

How a Bluetooth chat app sends messages without a network, what affects range, what happens with battery, and how to set one up before you need it.

Chatting with other passengers on a plane

Split seats on a group trip, a friend in another row, or an open channel for the cabin. How offline chat works on a flight and the etiquette that keeps it pleasant.

Messaging with no signal at festivals, on trails and at sea

Signal disappears when 80,000 people arrive or the trail drops into a valley. How to plan offline messaging for festivals, hikes and cruises, with realistic expectations.

Bluetooth mesh messaging, explained

In a mesh, phones running the same app pass messages along. What that means for range, why crowds help, what can slow it down, and how it differs from normal chat.

Encrypted offline chat: privacy without servers

No servers means no message copies stored in a data centre. What end-to-end encryption protects in an offline chat app, and what it can't protect.

Airplane mode on iPhone: what still works

Airplane Mode cuts cellular, but Wi-Fi and Bluetooth can come back on. A clear list of what works, what doesn't, and why messages say not delivered.

Offline communication in emergencies: a realistic backup plan

When networks fail after a storm or blackout, nearby offline messaging can help families and neighbours coordinate. What to prepare and where its limits are.

Offline messengers compared

Bluetooth apps, mesh radios and the apps that came and went. How Flight Mode Chat, Bitchat, Meshtastic and others differ, and which suits which trip.