Umwelt locks your computer when you are away from it and unlocks it when you come back, automatically. By measuring the strength of the Bluetooth signal from your smartwatch, it "senses" when you are close or away. You can adjust the locking/unlocking distance very easily from the main menu. The Mac version works with any Bluetooth LE wearable device that you can pair with the computer.
It's a super-fast desktop application that prepares your tracks for Cue Play DJ.
