What has Jack Dorsey, the founder of Twitter (now X) been up to lately? Among other things, creating experimental little projects, like a new private messenger that doesn’t need the internet to function.

Twitter co-founder and Block Head Jack Dorsey launched a new peer-to-peer messaging app over the weekend called Bitchat that runs entirely over Bluetooth. Bitchat relies on Bluetooth Low Energy mesh networks to send encrypted communications directly to nearby devices without requiring internet or cellular service.