This is a very helpful product for those you cannot get a graphing calculator.
We have 1 to 1 classrooms at my school. This app saved some of the kids from buying a graphing calculator of their own. I didn't like the fact though that they couldn't send the graphs to me electronically very easily. You have to take a screen shot and a lot of times they were too big for what I wanted to do with them.
How I Use It
My students that don't have graphing calculators use it to do all of their math work.