This is EXTREMELY unreliable, not only is it's distance measurement way off (to be expected, BT wasn't designed as sonnar) but the app "forgets" your computer after being away for ~5 minutes. YES, I paid for pro and YES, I allowed it to run in the background. When I come back to my computer not only does it not unlock but the phone apps wants to walk me through pairing again.

Do not waste your time/money on this app. It may have a nice UI but it simply doesn't work!