Airlock is a preference pane for Mac that works almost in symbiosis with your iPhone or iTouch and can automatically determine when to lock your Mac.
After you install the prefpane , the operation is as simple as using the Bluetooth connection, and let the iPhone to communicate with the Mac. Once we are away from the communication range, the computer is automagically locked .
AirLock coast $7.77 and you can download it here. You can also test it for free for 3 hours…