Perfect App Protector Pro. Google Market Top20 Application. "Perfect AppLock! ". Relible security measurement for your phone apps! Perfect AppLock! Lets you protect any applications you want with a passcode: SMS, Email, Pictures, Camera, USB Connect, Calendar, Messanger. Any apps you choose. # Feautures. 1. Lock Apps. 2. Screen Filter supports. 3. Rotation Lock supports.