Safe – Lock Screen Security App is a free Android app that offers a secure way to lock your smartphone or tablet. This app offers a variety of lock screen wallpapers that resemble a safe lock, and you can also choose to show or hide your battery status, current time and date, and missed call and new message notifications. To use the app, set a three-digit lock screen pin that will be known only by you, and enable the unlock sound to hear a realistic safe clicking noise every time you set the screen lock password. Safe – Lock Screen Security App is a simple and effective way to keep your device safe from intruders and protect your privacy.