Block CEO and Twitter co-founder Jack Dorsey wrote in an X post on Sunday night that he spent his weekend creating an app ...

Jack Dorsey just launched an app called Bitchat. This is a peer-to-peer messaging service that uses Bluetooth.

As I've experimented and played with a lot of different sensors, I've discovered that these basic devices can be built for super cheap, and they're incredibly versatile. When you're done using an ...