This is a list of standards-based aligned Math apps for iPad
Google Chrome app: https://chrome.google.com/webstore/detail/bhdheahnajobgndecdbggfmcojekgdko
Website: https://www.desmos.com/
Edmodo app: http://www.edmodo.com/publisher?uid=3382251
Free iPad app: https://itunes.apple.com/us/app/graphing-calculator-by-desmos/id653517540?mt=8&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/graphing-calculator-by-desmos/id653517540?mt=8&at=10l6SU
Free Android Phone app: https://play.google.com/store/apps/details?id=com.desmos.calculator
Free Android Tablet app: https://play.google.com/store/apps/details?id=com.desmos.calculator
Paid iPad app: https://itunes.apple.com/us/app/pattern-blocks-by-brainingcamp/id485065679?mt=8&uo=4&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/maths-toolbox/id599614966?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/geoboard-by-math-learning/id519896952?mt=8&uo=4&at=10l6SU
Free iPad app: https://itunes.apple.com/us/app/geoboard-by-math-learning/id519896952?mt=8&uo=4&at=10l6SU
Website: http://www.mathlearningcenter.org/web-apps/geoboard/
Google Chrome app: https://chrome.google.com/webstore/detail/geoboard-by-the-math-lear/gaakmmdiopnmcenkojohldanladpajak
Paid iPad app: http://itunes.apple.com/in/app/graphs-by-tap-to-learn/id415598605?mt=8&uo=4&at=10l6SU
Paid iPhone app: http://itunes.apple.com/in/app/graphs-by-tap-to-learn/id415598605?mt=8&uo=4&at=10l6SU
Paid iPad app: http://itunes.apple.com/us/app/graphing-calculator-hd/id374274107?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/ezymaths/id563471869?mt=8&uo=4&at=10l6SU
Free iPad app: https://itunes.apple.com/us/app/ezymaths/id563471869?mt=8&uo=4&at=10l6SU
Free iPad app: https://itunes.apple.com/us/app/free-graphing-calculator/id378009553?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/free-graphing-calculator/id378009553?mt=8&uo=4&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/scientific-graphing-calculator/id369480853?mt=8&uo=4&at=10l6SU
Paid iPhone app: https://itunes.apple.com/us/app/scientific-graphing-calculator/id369480853?mt=8&uo=4&at=10l6SU
Free Mac program: http://www.geogebra.org/cms/download
Free Windows program: http://www.geogebra.org/cms/download
Google Chrome app: https://chrome.google.com/webstore/detail/geogebra/bnbaboaihhkjoaolfnfoablhllahjnee
Paid iPad app: https://itunes.apple.com/us/app/4-dice-fraction-games/id583546023?mt=8&uo=4&at=10l6SU
Paid iPhone app: https://itunes.apple.com/us/app/4-dice-fraction-games/id583546023?mt=8&uo=4&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/ordered-fractions-compare/id592036890?mt=8&uo=4&at=10l6SU
Paid iPhone app: https://itunes.apple.com/us/app/ordered-fractions-compare/id592036890?mt=8&uo=4&at=10l6SU
Free iPad app: https://itunes.apple.com/us/app/5-dice-order-operations-game/id572774867?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/5-dice-order-operations-game/id572774867?mt=8&uo=4&at=10l6SU
Paid iPhone app: https://itunes.apple.com/us/app/algebra-touch/id384354262?mt=8&uo=4&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/algebra-touch/id384354262?mt=8&uo=4&at=10l6SU
Free Android Phone app: https://play.google.com/store/apps/details?id=com.visionobjects.calculator
Free iPhone app: https://itunes.apple.com/en/app/myscript-calculator/id578979413?mt=8&uo=4&at=10l6SU
Free iPad app: https://itunes.apple.com/en/app/myscript-calculator/id578979413?mt=8&uo=4&at=10l6SU
Free iPad app: https://itunes.apple.com/us/app/chocolate-chip-cookie-factory/id556939800?mt=8&uo=4&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/chocolate-chip-cookie-factory/id548563789?mt=8&uo=4&at=10l6SU
Free iPad app: https://itunes.apple.com/us/app/chicken-coop-fractions-game/id484561886?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/chicken-coop-fractions-game/id484561886?mt=8&uo=4&at=10l6SU
Free iPad app: https://itunes.apple.com/us/app/isosceles-geometry-sketchpad/id554492532?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/isosceles-geometry-sketchpad/id554492532?mt=8&uo=4&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/isosceles+-geometry-sketchpad/id547654254?mt=8&uo=4&at=10l6SU
Paid iPhone app: https://itunes.apple.com/us/app/isosceles+-geometry-sketchpad/id547654254?mt=8&uo=4&at=10l6SU
Free iPad app: https://itunes.apple.com/us/app/sketchpad-explorer/id452811793?mt=8&uo=4&at=10l6SU
Paid iPhone app: https://itunes.apple.com/us/app/math-formulas-reference-guide/id423545644?mt=8&uo=4&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/math-formulas-reference-guide/id423545644?mt=8&uo=4&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/3d-geometry/id555596048?mt=8&uo=4&at=10l6SU
Paid Mac program: https://itunes.apple.com/us/app/3d-geometry/id558182993?mt=12&uo=4&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/dragonbox-algebra-12+-award/id634444186?mt=8&at=10l6SU
Paid iPhone app: https://itunes.apple.com/us/app/dragonbox-algebra-12+-award/id634444186?mt=8&at=10l6SU
Paid Mac program: https://itunes.apple.com/us/app/dragonbox-algebra-12+-award/id813681744?mt=12&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/hands-on-equations-1-fun-way/id505948222?mt=8&uo=4&at=10l6SU
Paid iPhone app: https://itunes.apple.com/us/app/hands-on-equations-1-fun-way/id505948222?mt=8&uo=4&at=10l6SU
Website: http://www.khanacademy.org/
Free iPad app: https://itunes.apple.com/us/app/id469863705?mt=8&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/id469863705?mt=8&at=10l6SU
Free Android Phone app: https://play.google.com/store/apps/details?id=org.khanacademy.android
Free Android Tablet app: https://play.google.com/store/apps/details?id=org.khanacademy.android
Edmodo app: https://spotlight.edmodo.com/product/khan-academy,324527/
Free iPad app: https://itunes.apple.com/us/app/itooch-middle-school-math/id521676063?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/itooch-middle-school-math/id521676063?mt=8&uo=4&at=10l6SU
Paid iPad app: http://itunes.apple.com/us/app/factor-samurai/id441919897?mt=8&uo=4&at=10l6SU
Paid iPhone app: http://itunes.apple.com/us/app/factor-samurai/id441919897?mt=8&uo=4&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/the-ruler/id367353754?mt=8&uo=4&at=10l6SU
Free iPad app: https://itunes.apple.com/us/app/buzzmath-middle-school/id593186620?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/matchmatics-lite-matchstick/id564348049?mt=8&uo=4&at=10l6SU
Free iPad app: https://itunes.apple.com/us/app/matchmatics-lite-matchstick/id564348049?mt=8&uo=4&at=10l6SU
Paid iPhone app: https://itunes.apple.com/us/app/matchmatics-matchstick-math/id544505866?mt=8&uo=4&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/matchmatics-matchstick-math/id544505866?mt=8&uo=4&at=10l6SU
Paid iPad app: http://itunes.apple.com/us/app/math-games-math-vs-zombies/id470896560?ls=1&mt=8&uo=4&at=10l6SU
Paid iPhone app: http://itunes.apple.com/us/app/math-games-math-vs-zombies/id470896560?ls=1&mt=8&uo=4&at=10l6SU
Free iPad app: https://itunes.apple.com/ca/app/virtual-manipulatives!/id471341079?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/magicplan-csi/id480247904?mt=8&uo=4&at=10l6SU
Free iPad app: https://itunes.apple.com/us/app/magicplan-csi/id480247904?mt=8&uo=4&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/quick-math-arithmetic-times/id537802071?mt=8&uo=4&at=10l6SU
Paid iPhone app: https://itunes.apple.com/us/app/quick-math-arithmetic-times/id537802071?mt=8&uo=4&at=10l6SU
Paid iPad app: https://itunes.apple.com/app/mathboard/id373909837?mt=8&uo=4&at=10l6SU
Paid iPhone app: https://itunes.apple.com/app/mathboard/id373909837?mt=8&uo=4&at=10l6SU
Paid Android Phone app: https://play.google.com/store/apps/details?id=com.palasoftware.mathboard
Paid Mac program: https://itunes.apple.com/us/app/mathboard/id413393758?mt=12&uo=4&at=10l6SU
Paid Android Phone app: https://play.google.com/store/apps/details?id=com.wewanttoknow.DragonBoxPlus
Paid iPad app: https://itunes.apple.com/us/app/dragonbox-algebra-5+/id522069155?mt=8&at=10l6SU
Paid iPhone app: https://itunes.apple.com/us/app/dragonbox-algebra-5+/id522069155?mt=8&at=10l6SU
Paid Mac program: https://itunes.apple.com/us/app/dragonbox-algebra-5+/id524967552?mt=12&at=10l6SU
Free iPad app: https://itunes.apple.com/us/app/math-vs-undead-educational/id687283022?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/math-vs-undead-educational/id687283022?mt=8&uo=4&at=10l6SU
Free Android Phone app: https://play.google.com/store/apps/details?id=com.mathvszombies.mathgame
Free iPhone app: https://itunes.apple.com/us/app/math-with-your-friends-game/id1159371308?mt=8&uo=4&at=10l6SU
Free iPad app: https://itunes.apple.com/us/app/math-with-your-friends-game/id1159371308?mt=8&uo=4&at=10l6SU
Free Android Phone app: https://play.google.com/store/apps/details?id=com.mathwithyourfriends
Free Android Tablet app: https://play.google.com/store/apps/details?id=com.mathwithyourfriends