Total waste of money and just consumes battery. We already have several ways to lock the BB, securely or unsecured, as per the user's choice and none of them require a background-running program to use. This means better memory and battery life.
Bulbera
easy lock = slide up
Drag lock = slide down
Slide lock = slide right
Pattern lock = drag lock or slide right and pattern
Passcode lock = draglock or slide right and number code
All in app world