This is a brilliant app. I love using this app as a warm up first thing at the beginning of class. For example, the other day the students wrote down a list of three things they are thankful for this Thanksgiving. We used this list as a springboard into a more descriptive, vivid list of things. Using the chalkboard to record ideas rather than a piece of paper motivates the students.
Other ways to use this app include for vocabulary practice, spelling bees, brainstorming ideas, etc.