Looking for an automatic app data cleaner.

Hopefully I am in the right place.
I Have an app that opens other apps up (Intentionally) but it leaves that apps running in the background which bogs down the phone because the RAM gets full. So I am looking for an app that can be scheduled to run that will accomplish this but leaves the main app still running. Would an app that clears other apps data (Not cache.) accomplish this? I believe when the app data is cleared from the app it closes.
Android Lolipop, marshmallow, and nougat compatible.
Phone cannot be rooted.

I could not find a Now Cleaner in the play store.
I have tested many apps but none dump the app data. Cache cleaners are plentiful but that is not what I am searching for.

Nox does the same as every other app I have tested. It does dump the cache but does not dump app data.
I started my testing while my phone was running 14 apps. I whitelisted the one that I did not want to be cleaned. It did not shut down any when using the memory booster. These apps are simply going after cached data and not app data. No apps were actually closed which happens when you dump app data from a specific app.
You can test this for yourself and see. Run the cleaner with a bunch of apps opened up. After it cleans go to settings/apps/X app/storage and you should see the cache at 0 but app data untouched. The app will remain open.