Rubrics

Get it here.
Cost: $2.99

UDL Guideline 9.1 - Promote expectations and beliefs that optimize motivation

Expectations should be made highly transparent to students and the Rubrics app makes this an easy task to accomplish.  

General Critique

This is a very intuitive app that is easy to navigate because of labeling and the fixed location of tools.  Aside from merely creating rubrics, teachers can use the app to record grades electronically!