I’m sorry for the OT, but there is quite a bit of talk about leaving some apps open all the time (and in an order too).
If you can do without the cover action, native apps make good candidates for using the Partnerspace feature, as explained well in this post:
I currently keep Notes/Settings/Email there. Having only 3 apps makes accessing them easier, but more are possible.
And it was the idea that i can access them in a specific order that sold it for me.