Once you get to 3 times tables, it becomes an app you need to pay $4.99 for if you want to continue. It's a good game. I found it for a student in my class and don't think parents will pay. If you pay the $4.99 does it unlock the entire game all the way up to 12 x tables? Is it a one time fee or incremental ($4.99 gets you 4x - 6 x and then another $4.99 gets you 7x - 9x etc.