APKPure Appを使用する
App Lock (Pattern)の旧いバージョンをダウンロードすることが可能
アプリロック（パターン）は、不正な資源からアプリを保護することができます。
App Lock Pattern allows you to protect your applications with the pattern lock. Now you can easily protect your favorite apps like Whatsapp, Facebook, Twitter, Skype, SMS, Email, Gallery, Camera and contacts from unauthorized resource.
With this app you don't have to worry about your kids or others invading your privacy. When someone tries to unlock your application by trying a random pattern. it freeze the screen and notifies you by alarm sound.