Encrypted offline chat: privacy without servers

Flight Mode Chat sends messages directly between phones, without servers, and encrypts private chats end to end.

What that protects

• No server copy. There’s no company database holding your conversation.
• Relays can’t read. In a mesh, other phones may carry your message, but encrypted private messages stay unreadable to them.

What it doesn’t protect

• Public channels are public. Anyone nearby with the app can read them.
• Your screen. Someone looking over your shoulder sees what you see.
• The other person. They can screenshot or show the message to others.
• Presence. Being nearby with the app open makes you visible to other users.

Good habits

• Use private chats for anything personal.
• Choose a display name that doesn’t reveal more than you want.
• Turn Bluetooth off or close the app when you don’t want to be seen nearby.