On Android, especially the most recent versions, the archive functionality for apps has been a lifesaver. It basically packs apps into a specific format, keeps their entire state, and stores it on the disk. This also completely stops the app from running in the background and any other functionality that we don't need.

When we need to access the app again, we just have to restore it, which actually downloads the app and puts the app data back into it. It brings us back to exactly where we were before.

I do this to a lot of my apps these days, and it works very well. When we look at it, apps are nothing but a logged-in state for services that makes it easy to access them. On a typical web browser, you would have to keep logging in every now and then. Apps have a more persistent logged-in session that sometimes lasts forever as well.