Categories in To Do Android

It is so frustrating, the website and new outlook desktop app both have the ToDo section supporting categories. So, we know there is little UX design work. We just need the mobile apps to support the same feature that the web version does.

I have categories called "Priority 1", "Priority 2", etc.  I put my tasks into those categories based on importance and move them within a category by importance too.  This view works perfectly in Outlook on Windows.  But when I go to the To Do app on Android, I can find no way to get the same view.  Grouping by Category is a start, and then keeping the same order within the category is required too.  What's the point of a mobile app if it doesn't work the same as Windows?