http://vimeo.com/52132178
Keycard from Appuous is a nifty new app which keeps your Mac secure by locking your OS X user account automatically when you're not around. It does this by using your Bluetooth connection to check for your iPhone or iPad's presence, thereby detecting when you've stepped away from your computer or returned to it. Of course, unless you remember to take the paired device with you, Keycard won't be up for the task.
On the surface, the idea seems pretty useful as the app turns your iOS device into a personal 'keycard' of sorts. However, it isn't without pitfalls and the flashy promo video doesn't mention the fine print. I installed the program and after spending a few minutes with it immediately noticed a couple issues you should be aware of...