Incredibly slow and unresponsive app, sub-task/notes issues

This IOS app (and the companion MacOS version) is slow, even on a brand new iPad Pro 10.5. Unusable with the constant lag and interface response issues. Importing about 450 tasks from Wunderlist worked, but to see a sub-task, you must select the task, then another icon before I can see them. Same steps required to see a tasks notes. Either way I just cant use an app this slow on such fast hardware. The Microsoft Wunderlist replacement search continues...

walk--- about Any.do: To-Do List, Tasks, Calendar & Reminders, v4.9.0