KeepLock is a free security app. You can lock important apps, system settings, and even your gallery. You can also prevent your children from making in-app purchases by accident, or deleting important information.
Super Cleaner (Antivirus & Boost) is a small, fast, and smart Android device cleaner and booster. With this app you can free up storage, boost RAM, remove unnecessary Apps, cool down CPU, boost games and get your mobile running like new again.
One Locker is an App Lock and App Protector that will lock and protect apps with using password or pattern. One Locker can lock your contacts, incoming calls, e-mail, sms, settings, photos or any apps / games in your Android phone.