This app was mentioned in 1 comment, with an average of 1.00 upvote
just found a stress free tap game. you should try it out if you have the time. it's in japanese but you'll figure out the gameplay easily. The important thing is, the skills are available even if you're offline.
https://play.google.com/store/apps/details?id=air.jp.globalgear.jwl
it even have those kodama like little creatures (if you ever watched princess mononoke)