Math Attack Pro

If your goal is to increase basic calculation speed (and of course accuracy), Math Attack Pro will not disappoint. High-contrast blackboard and chalk graphics work well for older kids but don't leave younger ones behind. Plentiful controls keep kids in the driver's seat. An old-fashioned ding sound indicates correct answers, and the device gently vibrates with incorrect ones. Scoreloop and heyZap scoring networks can be motivators for teens with accounts (and permission to post to social media), but younger kids can content themselves with the basic and advanced stats kept by the app. Kids should start in practice mode, slowly including more operators and increasing the number of questions, then move on to timed or race mode. Survival, three strikes, and rounds should be saved to cement mastery. Kids can save their results, retry, or save to scoring networks at the end of each game. High scores for each game are available from the main menu and unique user names can be entered at the end of any game.

The downsides are a lack of depth of content and perhaps some reference tables or memorization tricks. More math concepts at the upper elementary level would boost overall value.