The app does support the importance field. To make use of it, tap on the filter, sort, or display buttons at the bottom of any task list. If you don't see it there, then you are using an older version of the software. Note that the importance field does not appear in the task editor since it is a calculated value which cannot be directly edited.

This application does not recognize or use or even allow the setting up of a View which is equal to that which Toodledo calls "Importance". This is a real shame as this Toodledo view is considered by many, if not most, as the single best view / sort order. With this omission alone, I will not be purchasing this application, and I will continue to look for an Android application that in fact does support ALL features of Toodledo. Hopefully the Developer will address this oversight as the rest of the application is looking very promising, and possibly the best To Do List out to date.