The main feature is actually exactly what this article mentions - items do not disappear when you check them off, instead they strike-through (working on an animation and haptic feedback for this!). There are small celebrations when items are completed, and there is a calendar for tracking how often tasks are done or left undone. All actions (ie: clicking a todo or snoozing a todo) are written to a local database, so analytics are possible. Export to google docs is a wife-requested feature.

There are some AI things, ie: it's setup for me to write code to let chatGPT suggest TODOs or recommend changes to todo lists, but to be honest I haven't gotten too deep in the weeds with AI stuff yet - mostly been focused on UI/UX which is difficult for me as a devops engineer!