I think this app is a great idea and is much easier than carrying around my cup of Popsicle sticks! I also like that it keeps valuable data I can use for participation graded and sharing with parents. The advantage my regular sticks have is that they are coded for ability level. This helps when I want to choose, say, an emergent student to answer what I know will be an easy question to give them that opportunity to be successful. Or a more advanced student when I need a correct answer so I can keep my lesson moving. That would be my suggestion for improvement in your next update, to make this great app even better.
Nattles19 about Stick Pick