With regards to being user friendly, it would be great if the app had some methods of taking space [2 4 3 7], or line delaminated data
data, and putting it into the [2,4,3,7] needed to paste into math studio. This would allow easier data input from other phone apps ie numbers, excel, notepad etc. That said, I have found clunky work arounds such as formatting data on a desk top pc that has more export options of then emailing it.
Just food for thought.