Flipper's Busy Bar Lights Up a 'Do Not Disturb' Signal to Cut Desk Distractions

Flipper Devices’ Busy Bar is a $249 hardware desk clock with a large red LED that displays “BUSY” to signal coworkers and family you don’t want to be interrupted. It pairs with the Busy app but can be used offline, offers timed work sessions like the Pomodoro technique, and can integrate with smart-home systems via Matter. Flipper argues a physical signal can be more effective than software-only tools, and notes the device is open-source and designed to be disassembled.