Twitter co-founder Jack Dorsey has launched a new messaging app that works without wifi or phone service. Bitchat instead operates using a phone’s Bluetooth signal, which allows users to communicate during situations such as music festivals or protests where mobile signal is patchy or restricted.

Block CEO Jack Dorsey has launched Bitchat, a new peer-to-peer messaging app that works entirely over Bluetooth mesh networks.

Jack Dorsey, the former Twitter CEO, has launched a new messaging app that does not rely on the internet. Called Bitchat, the app uses Bluetooth to let people send messages directly to one another. It is designed to keep working even when internet access is blocked,