Use APKPure App
Get AppLocker old version APK for Android
AppLock can lock SMS, Contacts, Gmail, Facebook, Gallery, Market, Settings.
AppLocker will protect your apps with a PATTERN or a PIN Number
With the help of App Locker, you may:
Never worry again about a friend borrow your phone to play games again!
Never worry again about private data in some apps may be read by someone again!
Never worry again about your kids changing phone's Settings, paying for games, and locking your device!