01
What bitchat is
A peer-to-peer messenger with a local mesh and an internet path, and a clear line between the app and this website.
Field notes
Guides
Six articles, written for this site. They explain the public design of the app. They are not a copy of the repository README.
02
Bluetooth mesh messaging
Hops, range, relays, deduplication, and the reasons a nearby phone can still miss a message.
03
bitchat and other messengers
An honest comparison with WhatsApp, Telegram, and SMS. Different jobs, not a winner’s podium.
04
Geohash channels
How a short code becomes a room, and how to pick a length that matches the crowd you want.
05
Privacy limits
What encryption covers, what a nearby radio can still see, and what a wipe cannot undo.
06
Nostr relays
The online half of the app: public relays, favorites, and why this is not the same as the mesh.