This past year my daughter had to do this twice a week. We paid 5.00 for the app. Well worth that. But, they told us about two weeks ago our app was outdated and we had to buy the app again for 5.00.
I would have given three starts except for that. I almost would give it four.
Okay- she is 10, she was 9.5 at beginning of using it. She found it boring. Now, so are flash cards, so to be fair... Drill is boring, but I felt they could give small incentives to keep them interested like have them pick their favorite character and earn a collection of them. Or, even a cute thing would be a silly joke that pops up or if a picture of a cool animal in the wild when they do good. Something.
A solid app that the gifted and regular programs use. I do recommend.