NumBlox is cuisenaire rods - number blocks - for mobile devices!

See NumBlox demo video on YouTube. Or, Screenshots below.

New for NumBlox version 2.1.2, January 2013

NumBlox is available on web, iOS, and Android - iPhone, iPad, iPod touch, Kindle Fire, NOOK HD™ and NOOK HD+™ by Barnes & Noble, Android phones and tablets, all sizes. Features vary - the web version doesn't have all the features of the mobile apps, at the moment.

NumBlox for iPad, iPhone, and iPod touch from the App Store Android app on Google Play NOOK App : NumBlox Android app on Amazon App Store