I recommend adding a website block Category for Android apps.
I would like to setup a cell phone for my child with the Android apps I feel are appropriate and then my child can ask me to install others as needed, instead of the children adding whatever apps they want from websites. I know I can use Norton App Lock to block Google Play Store app and I can put in the Google Play Store web address in the block list, but there seems to be a lot of other sites that offer Android apps. Too many to block them all with the block list, but would be nice if there was a category that I could just check the box and block them all..