We started with the free shape app & then I bought this one. Its great! Ive downloaded (in app) most of the other packs (free). They really are fun. Some are sort of silly (the food ones) but others are great. It can grow with your child .. There are fractions, roman numerals, money etc. There are 2 reason I gave it 4 stars instead of 5. #1 is that I would like to see an option for the Letters package to do phonics sounds. It currently does upper or lowercase---but no letter sounds. #2 the volume levels... The questions are very quiet (even set at the max volume) and the the confirmation cheers/clapping is deafeningly loud. This app is great and the updates have been great but PLEASE equalize the volume. But $3 and the ability to download all the other packs in app for free?? ... Great!! --I do wish Id seen the just quizzing version of this app series. My daughter sometimes skips the quizzes and just does the games... But thats my fault! :)