Airlock is described as 'allows your Mac to lock itself, plain and simple. Using your iPhone, Bluetooth® wireless technology, and a smidgen of pixie dust, Airlock determines whether you're near your computer. When you leave the room - poof! - your Mac locks itself. “And when I come back?'. There are more than 10 alternatives to Airlock for a variety of platforms, including Mac, Windows, iPhone, iPad and Apple Watch. The best alternative is USB Raptor, which is both free and Open Source. Other great apps like Airlock are Near Lock (Free Personal), VSUsbLogon (Free), Predator (Paid) and MacID (Paid).
Lock and unlock your screen when an associated bluetooth device, like your phone, goes out and back into range. Screen turns black or displays selected image when locked and optional password text box appears when key pressed or mouse clicked.
Secure: It is not possible to use your computer after you have locked it with KeyLock. Our software uses the Windows lock screen to lock your PC, making it impossible to reach the desktop. After unlocking, you can immediately use your computer again.