Not appropriate to use within a classroom setting
This app is decent in that it challenges users in problem solving and critical thinking. However, the app is very simple and does not provide anything that a textbook cannot. The app also has advertisements attached that would not be appropriate in a classroom setting. One thing that might make this app more useful would be to have different levels in which the user progresses through. If a user were to get incentives for finishing a level or completing a level within a certain time frame, the user may be more inclined to buy/use the app. Overall, it is an alright app appropriate for grades three and four, but no higher.