My favorite math apps for pre-algebra and middle school algebra.
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
Paid iPad app: http://itunes.apple.com/app/wolfram-pre-algebra-course/id453096829?ls=1&mt=8&uo=4&at=10l6SU
Paid iPhone app: http://itunes.apple.com/app/wolfram-pre-algebra-course/id453096829?ls=1&mt=8&uo=4&at=10l6SU
Paid iPad app: http://itunes.apple.com/app/wolfram-algebra-course-assistant/id410592976?mt=8&uo=4&at=10l6SU
Paid iPhone app: http://itunes.apple.com/app/wolfram-algebra-course-assistant/id410592976?mt=8&uo=4&at=10l6SU
Paid iPhone app: https://itunes.apple.com/us/app/alge-bingo/id490498376?mt=8&uo=4&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/alge-bingo/id490498376?mt=8&uo=4&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
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
Website: http://www.algebrahelp.com/
Free Android Phone app: https://play.google.com/store/apps/details?id=mathterms.com.andyfelong
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
Free iPad app: https://itunes.apple.com/us/app/wuzzit-trouble/id600190128?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/wuzzit-trouble/id600190128?mt=8&uo=4&at=10l6SU
Website: http://www.ixl.com/
Paid Android Phone app: https://play.google.com/store/apps/details?id=com.wewanttoknow.DragonBox&hl=en
Paid iPad app: http://itunes.apple.com/us/app/dragonbox/id523587411?mt=8&uo=4&at=10l6SU
Paid iPhone app: http://itunes.apple.com/us/app/dragonbox/id523587411?mt=8&uo=4&at=10l6SU
Paid Mac program: http://itunes.apple.com/us/app/dragonbox/id524970998?mt=12&uo=4&at=10l6SU
Free iPad app: https://itunes.apple.com/us/app/math-tub-by-happsan/id598256534?mt=8&uo=4&at=10l6SU
Website: http://braingenie.ck12.org/
Free iPad app: https://itunes.apple.com/us/app/diamond-factor/id464915487?mt=8&uo=4&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/itooch-6th-grade-math-maths/id521720767?mt=8&uo=4&at=10l6SU
Paid iPhone app: https://itunes.apple.com/us/app/itooch-6th-grade-math-maths/id521720767?mt=8&uo=4&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/itooch-7th-grade-math-maths/id521721978?mt=8&uo=4&at=10l6SU
Paid iPhone app: https://itunes.apple.com/us/app/itooch-7th-grade-math-maths/id521721978?mt=8&uo=4&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/math-doodles/id526959716?mt=8&uo=4&at=10l6SU
Website: http://wowzers.com/