Keycard for Mac is an app best avoided!
Keycard from Appuous is advertised as an app which keeps your Mac protected by locking your OS X user account automatically when you’re away from it. It does this by using your Bluetooth connection to check for your iOS device’s (iPhone or iPad) presence, thereby detecting when you’ve stepped away from your computer or come back to it. Unfortunately, this sounds good only in theory.
To be fair, the idea seems pretty cool as the app turns your iOS device into a virtual ‘keycard’ of sorts. The execution, however, is terrible. There are glaring issues you will come across.
For starters, you’ll need to install the Keycard app from the Mac App Store, which costs $7 for a limited period of time, and $9 from then on.
Secondly (and this is the deal-breaker), the bluetooth sensitivity is extremely unreliable. The app is supposed to lock my Mac when I walk out of the room. I found out, however, that the Mac would not lock until I was out of Bluetooth range, which for me was 45ft+. So unless I practically left the house with the key card, my Mac would remain unlocked. This kind of defeats the entire purpose of having a keycard. There is no way to decrease the range and sensitivity of the device’s bluetooth as well.
While Keycard’s concept is definitely unique and has solid potential, you should probably wait until developers iron out the kinks present in the initial release before buying it. Until then, I would strongly recommend that you give Keycard a miss.
Requirements: OS X 10.7 or later, 64-bit processor