Free iPad app: https://itunes.apple.com/us/app/number-pieces-basic-by-math/id611452042?mt=8&uo=4&at=10l6SU
Website: http://www.mathlearningcenter.org/web-apps/number-pieces/
Paid iPad app: http://itunes.apple.com/us/app/math-bingo-games-a-racing/id415231843?ls=1&mt=8&uo=4&at=10l6SU
Paid iPhone app: http://itunes.apple.com/us/app/math-bingo-games-a-racing/id415231843?ls=1&mt=8&uo=4&at=10l6SU