Here is a cute robot that locks your phone to help you focus. The Nub doesn’t have a screen, nor does it use a camera. It uses a radar to sense you. It locks the apps that distract you to help you focus. It chirps but doesn’t have voice commands. You will be able to use this to track how long you have stayed focused.
To use this, just put it on your desk, pair it to your phone, and tap to lock in. The robot uses 60 and 24GHz sensors to detect movement. It has two motors to move its head. It also has an IMU to sense your taps and touches. You can find this project on Kickstarter.