App Lock Pro (com.softwego.applock.paid) on Google Play
This is the ad-free (paid) version of App Lock (Keypad), App Lock (Pattern), or App Lock (free version).App Lock Pro is an app protector which can basically lock your applications such as contacts, calls, e-mail, sms, photos or any app in your phone or tablet. Best feature about it? It can sound the alarm in case of intruders! With this applocker you don't have to worry about kids, siblings, spouse or others invading your privacy or messing with your phone!Features:- lock any apps on your device (system or installed)- use either a pattern or a passcode (password)- sounds the alarmYour apps will be password protected and only you can launch them!