iLiveMath 1234 Series
iLiveMath1, 2, 3, and 4 Series are available as multi-platform apps designed to run on iOS (iPad, iPhone, and iPod Touch), and Android (Google Play, Kindle, Nook).
iLiveMath Math Word Problem App Series
Each Spans 1st through 6th Grade with three levels of difficulty; Kindergarteners may enjoy the photos & videos. These are only available on Apple iOS.