I bought this app for my 5th grader to practice her facts before school. Its working great so far, shes having fun trying to beat her [revious days score. Mad minute is her favorite but shes enjoying enter the flow because it adjusts to her level and advances with her. This app is a great way to warm up her brain before school, she feels more confident doing her rocket math in class now. I just wish it had multi-user capabilities, it would be nice if the other kids could play enter the flow without affecting the younger kids progress. It would also be really cool if they could challenge each other in mad minute. The only reason I didnt give it 5 stars is because the multi-user function is missing, if there was just one kid in this house I wouldnt even care.