The checkmark button to click on in order to mark tasks as complete through widgets is quite small and often missed when pressed. I’ve also noticed it has a pretty delayed reaction when clicking. Also wish there was an easier/alternative way to undo task completions, more easily accessible and visible besides shaking the phone to undo (which is only available immediately after accidentally marking a task as complete).
Still overall a helpful app, and looking forward to more app updates and improvements and bug fixes over time!