I recently installed the NoRoot Firewall app so I see which apps are accessing the internet and block those which shouldn't need access. The good part is that I haven't seen any apps access the internet that shouldn't - no flashlights, notepads, etc.
The problem is that I'm seeing some apps that will need internet access trying to connect dozens of times. I haven't used soundhound in months and it's trying to connect dozens of times in a half hour period. There are other apps that I rarely use that are trying to connect once in a while, like flickr, cloud drive (which isn't even set up), that I wish I could disable unless I need it, but I can live with those.
My questions are:
Why are some apps connecting so often when they're not in use?
Is there a way to disable apps from making connections until I'm actively trying to use them?