Kids Math Games for Girls and Boys scores kids on addition, subtraction, multiplication, and division problems solved via a colorful interface. As kids develop their skills, they can test themselves on harder levels, as well, making this a good tool for tracking progress and improving skills in math.
This isn't really a game, but the colorful nature of the interface makes it fun, and the fact that the sets of problems are timed lets users compete against themselves to get better results. Otherwise, though, the program is basically sets of 15 multiple choice questions that consist of an equation, and the user has to pick the right answer from four possible options. The app keeps track of how many questions were answered right and how many wrong, and it also tracks the total time it took to complete the set.
There are a lot of ads that pop up in this game, but you can pay $0.99 to remove them. The app is free to download, but the only sets of problems available are the simple addition ones. To unlock any of the other types of equations or levels of difficulty, you'll have to pay $0.99 each, or unlock everything for $2.99. Purchases are locked, so that kids can't do it themselves, but since the app is designed for five to 11-year-olds, it seems likely that the older users could follow the instructions and purchase upgrades, themselves. Overall, this is a good basic math practice app, although to get anything out of it for all but the youngest users, you'll probably have to pay to unlock all of the features.