I found an app I like to use for the #openSecretary project. It is called GRIT but I specifically am using the version found in fdroid instead of the apple store version which has online options and information sharing.
https://f-droid.org/en/packages/com.shub39.grit/
What I am discovering is that the key to using planning apps when you are #ADHD is how you use them. Information posts upcoming.