[androidmatcha]

Hi. I'm AndroidMatcha, and I'm a phoneaholic. I've been sober for 10 minutes.

I'm looking for help. I'm looking for something that will lock down my phone and will only let me use one of three apps when I tell it to. The three apps are Amazon Kindle, Moon Reader, and Play Books.

I've checked out many other apps (https://i.imgur.com/75EXL3a.jpg), but the problem with them, for my usage, is that they are "blacklist apps". They work by knowing what apps you want to block. For example, Facebook and Instagram. But I want to work on my netaholism the other way around. In other words. I want apps that I explicitly whitelist to be accessible to me. (The 3 reading apps I've specified).

I have a Samsung S9 running Android 8.0. Not rooted (and not rootable).