This app was mentioned in 3 comments, with an average of 2.33 upvotes
Mushroom Garden has been installed on every Android phone I've ever owned. Good slow paced collection style game, with "cute" mushroom characters. There's a few others by the same developers including a mutant food evolution game, a point and click style adventure game, and other versions of the mushroom garden.
https://play.google.com/store/apps/details?id=jp.co.beeworks.mushroomDX&hl=en
https://play.google.com/store/apps/details?id=jp.co.beeworks.mushroomDX&hl=en
Mushroom Garden is the Neko Atsume of the fungus world.