Plex organizes all of your video, music, and photo collections, and gives you instant access to them on all of your devices.
apps for Android, iOS
Free privacy protection and security app that can lock your files, apps and settings on Android powered smart phones.
ES App Locker – free app locker for Android.
LOCKit for Android is a light, powerful and yet free privacy protector, app locker, photo & video locker app.