Free Math Apps – All Grades

By Natalie Thomas

A list of free math apps for different platforms and grades. I have not tried them all but am merely compiling a list of options.

Made on edshelf.com.

Motion Math: Hungry Fish

Free iPad app: http://itunes.apple.com/us/app/motion-math-hungry-fish/id483049169?mt=8&uo=4&at=10l6SU

Free iPhone app: http://itunes.apple.com/us/app/motion-math-hungry-fish/id483049169?mt=8&uo=4&at=10l6SU

Geoboard

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

Motion Math Zoom

Free iPad app: http://itunes.apple.com/us/app/motion-math-zoom/id451793073?mt=8&uo=4&at=10l6SU

Free iPhone app: http://itunes.apple.com/us/app/motion-math-zoom/id451793073?mt=8&uo=4&at=10l6SU

MyScript Calculator

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

5 Dice: Order of Operations Game

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

Mathmateer

Free iPad app: https://itunes.apple.com/us/app/mathmateer-free/id408770902?mt=8&uo=4&at=10l6SU

Paid iPad app: https://itunes.apple.com/us/app/mathmateer/id393989284?mt=8&uo=4&at=10l6SU

Free iPhone app: https://itunes.apple.com/us/app/mathmateer-free/id408770902?mt=8&uo=4&at=10l6SU

Paid iPhone app: https://itunes.apple.com/us/app/mathmateer/id393989284?mt=8&uo=4&at=10l6SU

Motion Math: Wings

Free iPhone app: https://itunes.apple.com/us/app/motion-math-wings/id508228412?mt=8&uo=4&at=10l6SU

Free iPad app: https://itunes.apple.com/us/app/motion-math-wings/id508228412?mt=8&uo=4&at=10l6SU

Math !!!

Free iPad app: http://itunes.apple.com/us/app/math-workbook/id467548534?mt=8&uo=4&at=10l6SU

Free iPhone app: http://itunes.apple.com/us/app/math-workbook/id467548534?mt=8&uo=4&at=10l6SU

Math Champ for Students

Free iPad app: https://itunes.apple.com/app/math-champ-client/id516219415?mt=8&uo=4&at=10l6SU

Free iPhone app: https://itunes.apple.com/app/math-champ-client/id516219415?mt=8&uo=4&at=10l6SU

Sushi Monster

Free iPad app: https://itunes.apple.com/us/app/sushi-monster/id512651258?mt=8&uo=4&at=10l6SU

Free iPhone app: https://itunes.apple.com/us/app/sushi-monster/id512651258?mt=8&uo=4&at=10l6SU

Deep Sea Duel

Website: http://illuminations.nctm.org/ActivityDetail.aspx?ID=207

Free iPad app: https://itunes.apple.com/us/app/deep-sea-duel/id547246887?mt=8&uo=4&at=10l6SU

Free iPhone app: https://itunes.apple.com/us/app/deep-sea-duel/id547246887?mt=8&uo=4&at=10l6SU

Free Android Phone app: https://play.google.com/store/apps/details?id=air.AndroidPublish

Tiny Chicken Learns Math

Free iPad app: http://itunes.apple.com/in/app/tiny-chicken-learns-math/id490114227?mt=8&uo=4&at=10l6SU

Free iPhone app: http://itunes.apple.com/in/app/tiny-chicken-learns-math/id490114227?mt=8&uo=4&at=10l6SU

Oh No Fractions!

Free iPad app: https://itunes.apple.com/app/oh-no-fractions!-curious-hat/id593418681?mt=8&uo=4&at=10l6SU

Free iPhone app: https://itunes.apple.com/app/oh-no-fractions!-curious-hat/id593418681?mt=8&uo=4&at=10l6SU

Number Rack

Free iPad app: https://itunes.apple.com/us/app/number-rack-by-math-learning/id496057949?mt=8&uo=4&at=10l6SU

Free iPhone app: https://itunes.apple.com/us/app/number-rack-by-math-learning/id496057949?mt=8&uo=4&at=10l6SU

Google Chrome app: https://chrome.google.com/webstore/detail/number-rack-by-the-math-l/pdblapgbfbphhldogcijidlkbcgokfkc

Website: http://www.mathlearningcenter.org/web-apps/number-rack/

King of Math

Free iPhone app: https://itunes.apple.com/us/app/king-of-math/id473904402?mt=8&uo=4&at=10l6SU

Free iPad app: https://itunes.apple.com/us/app/king-of-math/id473904402?mt=8&uo=4&at=10l6SU

Paid iPhone app: https://itunes.apple.com/us/app/king-of-math-full-game/id545625741?mt=8&uo=4&at=10l6SU

Paid iPad app: https://itunes.apple.com/us/app/king-of-math-full-game/id545625741?mt=8&uo=4&at=10l6SU

Strength in Numbers

Free iPhone app: https://itunes.apple.com/us/app/strength-in-numbers-free/id635136984?mt=8&uo=4&at=10l6SU

Free iPad app: https://itunes.apple.com/us/app/strength-in-numbers-free/id635136984?mt=8&uo=4&at=10l6SU

Paid iPhone app: https://itunes.apple.com/us/app/strength-in-numbers/id523506928?mt=8&uo=4&at=10l6SU

Paid iPad app: https://itunes.apple.com/us/app/strength-in-numbers/id523506928?mt=8&uo=4&at=10l6SU

Kids Numbers and Math

Paid iPad app: https://itunes.apple.com/us/app/kids-numbers-and-math/id471989878?mt=8&uo=4&at=10l6SU

Paid iPhone app: https://itunes.apple.com/us/app/kids-numbers-and-math/id471989878?mt=8&uo=4&at=10l6SU

Free Android Phone app: https://play.google.com/store/apps/details?id=zok.android.numbers

Math Dojo

Free iPad app: https://itunes.apple.com/us/app/math-dojo-free-fun-math-for/id544240995?mt=8&uo=4&at=10l6SU

Paid iPad app: https://itunes.apple.com/us/app/math-dojo-fun-math-for-kids/id542601241?mt=8&uo=4&at=10l6SU

Free iPhone app: https://itunes.apple.com/us/app/math-dojo-free-fun-math-for/id544240995?mt=8&uo=4&at=10l6SU

Paid iPhone app: https://itunes.apple.com/us/app/math-dojo-fun-math-for-kids/id542601241?mt=8&uo=4&at=10l6SU

Algebra Genie

Free iPad app: https://itunes.apple.com/us/app/algebra-genie/id481026577?mt=8&uo=4&at=10l6SU

Free iPhone app: https://itunes.apple.com/us/app/algebra-genie/id481026577?mt=8&uo=4&at=10l6SU

Free Android Phone app: https://play.google.com/store/apps/details?id=air.com.zegenie.algebra

Math Games – Astro Math Practice Factors and Multiplication

Free iPad app: http://itunes.apple.com/us/app/math-games-astro-math-practice/id486756692?mt=8&uo=4&at=10l6SU

Free iPhone app: http://itunes.apple.com/us/app/math-games-astro-math-practice/id486756692?mt=8&uo=4&at=10l6SU

Numbler

Free iPad app: https://itunes.apple.com/us/app/numbler-free/id617010732?mt=8&uo=4&at=10l6SU

Paid iPad app: https://itunes.apple.com/us/app/numbler-math-game/id569515022?mt=8&uo=4&at=10l6SU

Free iPhone app: https://itunes.apple.com/us/app/numbler-free/id617010732?mt=8&uo=4&at=10l6SU

Paid iPhone app: https://itunes.apple.com/us/app/numbler-math-game/id569515022?mt=8&uo=4&at=10l6SU

Number Line

Free iPhone app: https://itunes.apple.com/us/app/number-line/id319589184?mt=8&uo=4&at=10l6SU

MathTappers: Multiples

Free iPhone app: https://itunes.apple.com/us/app/mathtappers-multiples-math/id371520443?mt=8&uo=4&at=10l6SU

GeometrIQ: Geometry Picture Game

Free iPad app: https://itunes.apple.com/us/app/geometriq-geometry-picture/id551984696?mt=8&uo=4&at=10l6SU

Free iPhone app: https://itunes.apple.com/us/app/geometriq-geometry-picture/id551984696?mt=8&uo=4&at=10l6SU

Ninja Chicken

Free iPad app: http://itunes.apple.com/in/app/ninja-chicken-tiny-chicken/id503807084?mt=8&uo=4&at=10l6SU

Free iPhone app: http://itunes.apple.com/in/app/ninja-chicken-tiny-chicken/id503807084?mt=8&uo=4&at=10l6SU

Isoceles – Geometry Sketchpad

Free iPhone app: https://itunes.apple.com/us/app/isosceles-geometry-sketchpad/id554492532?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

Mermaid Waters

Free iPhone app: http://itunes.apple.com/us/app/mermaid-waters-adventures/id454136246?mt=8&uo=4&at=10l6SU

Playful Minds: Math

Free iPad app: https://itunes.apple.com/us/app/playful-minds-math-5-8-years/id449569846?mt=8&uo=4&at=10l6SU

Free iPhone app: https://itunes.apple.com/us/app/playful-minds-math-5-8-years/id449569846?mt=8&uo=4&at=10l6SU

MathTappers: Find Sums

Free iPhone app: https://itunes.apple.com/us/app/mathtappers-find-sums-math/id353582286?mt=8&uo=4&at=10l6SU

Math Fight

Free iPad app: https://itunes.apple.com/us/app/math-fight-fun-2-player-mathematics/id738947827?mt=8&uo=4&at=10l6SU

Free iPhone app: https://itunes.apple.com/us/app/math-fight-fun-2-player-mathematics/id738947827?mt=8&uo=4&at=10l6SU

Quick Graph

Free iPhone app: https://itunes.apple.com/us/app/quick-graph-your-scientific/id292412367?mt=8&uo=4&at=10l6SU

Free iPad app: https://itunes.apple.com/us/app/quick-graph-your-scientific/id292412367?mt=8&uo=4&at=10l6SU

Paid iPhone app: https://itunes.apple.com/us/app/quick-graph+-your-scientific/id541477533?mt=8&uo=4&at=10l6SU

Paid iPad app: https://itunes.apple.com/us/app/quick-graph+-your-scientific/id541477533?mt=8&uo=4&at=10l6SU

EasyMeasure

Free iPhone app: https://itunes.apple.com/us/app/easymeasure-measure-your-camera!/id349530105?mt=8&uo=4&at=10l6SU

Free iPad app: https://itunes.apple.com/us/app/easymeasure-measure-your-camera!/id349530105?mt=8&uo=4&at=10l6SU

Mathtopia

Free iPad app: https://itunes.apple.com/us/app/mathtopia/id569333308?ls=1&mt=8&uo=4&at=10l6SU

Paid iPad app: https://itunes.apple.com/us/app/mathtopia+/id583383121?ls=1&mt=8&uo=4&at=10l6SU

Free iPhone app: https://itunes.apple.com/us/app/mathtopia/id569333308?ls=1&mt=8&uo=4&at=10l6SU

Paid iPhone app: https://itunes.apple.com/us/app/mathtopia+/id583383121?ls=1&mt=8&uo=4&at=10l6SU

Scientific Graphing Calculator

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

Mad Math

Free iPad app: https://itunes.apple.com/us/app/mad-math-lite/id389099317?mt=8&uo=4&at=10l6SU

Paid iPad app: https://itunes.apple.com/us/app/mad-math-2/id363485649?mt=8&uo=4&at=10l6SU

Free iPhone app: https://itunes.apple.com/us/app/mad-math-lite/id389099317?mt=8&uo=4&at=10l6SU

Paid iPhone app: https://itunes.apple.com/us/app/mad-math-2/id363485649?mt=8&uo=4&at=10l6SU

iTooch Middle School

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

Math Ref

Free iPhone app: https://itunes.apple.com/us/app/math-ref-free/id312756358?mt=8&uo=4&at=10l6SU

Free iPad app: https://itunes.apple.com/us/app/math-ref-free/id312756358?mt=8&uo=4&at=10l6SU

Paid iPhone app: https://itunes.apple.com/us/app/math-ref/id301384057?mt=8&uo=4&at=10l6SU

Paid iPad app: https://itunes.apple.com/us/app/math-ref/id301384057?mt=8&uo=4&at=10l6SU

iDynamic

Free iPhone app: https://itunes.apple.com/us/app/idynamic/id496739359?mt=8&uo=4&at=10l6SU

Free iPad app: https://itunes.apple.com/us/app/idynamic/id496739359?mt=8&uo=4&at=10l6SU

Mathway

Website: http://www.mathway.com/

Free Android Phone app: https://play.google.com/store/apps/details?id=com.bagatrix.mathway.android

Free iPad app: https://itunes.apple.com/us/app/mathway/id467329677?mt=8&uo=4&at=10l6SU

Free iPhone app: https://itunes.apple.com/us/app/mathway/id467329677?mt=8&uo=4&at=10l6SU

Tell Time – Little Matchups Game

Free iPad app: https://itunes.apple.com/us/app/tell-time-little-matchups/id440944851?mt=8&uo=4&at=10l6SU

Free iPhone app: https://itunes.apple.com/us/app/tell-time-little-matchups/id440944851?mt=8&uo=4&at=10l6SU

Clever Crazes You and Your Money

Free iPad app: https://itunes.apple.com/us/app/clever-crazes-you-your-money/id542643498?mt=8&uo=4&at=10l6SU

Free iPhone app: https://itunes.apple.com/us/app/clever-crazes-you-your-money/id542643498?mt=8&uo=4&at=10l6SU

Money for Kids

Free iPad app: https://itunes.apple.com/us/app/money-for-kids/id541876204?mt=8&uo=4&at=10l6SU

Free iPhone app: https://itunes.apple.com/us/app/money-for-kids/id541876204?mt=8&uo=4&at=10l6SU

GoChart

Free iPhone app: https://itunes.apple.com/us/app/gochart/id660032302?mt=8&uo=4&at=10l6SU

Free iPad app: https://itunes.apple.com/us/app/gochart/id660032302?mt=8&uo=4&at=10l6SU

Long Division Touch

Free iPad app: https://itunes.apple.com/us/app/long-division-touch/id574226151?mt=8&uo=4&at=10l6SU

Free iPhone app: https://itunes.apple.com/us/app/long-division-touch/id574226151?mt=8&uo=4&at=10l6SU

Math Equations

Free iPad app: https://itunes.apple.com/us/app/math-equations/id698290670?mt=8&uo=4&at=10l6SU

Free iPhone app: https://itunes.apple.com/us/app/math-equations/id698290670?mt=8&uo=4&at=10l6SU

PBS Parents Play & Learn

Free iPad app: https://itunes.apple.com/us/app/pbs-parents-play-learn-hd/id605542914?mt=8&uo=4&at=10l6SU

Free iPhone app: https://itunes.apple.com/us/app/pbs-parents-play-learn/id605536121?mt=8&uo=4&at=10l6SU

Free Android Phone app: https://play.google.com/store/apps/details?id=air.org.pbskids.playandlearnhd

Sector 33

Free iPhone app: https://itunes.apple.com/us/app/sector-33/id486953105?mt=8&uo=4&at=10l6SU

Free iPad app: https://itunes.apple.com/us/app/sector-33/id486953105?mt=8&uo=4&at=10l6SU

Free Android Phone app: https://play.google.com/store/apps/details?id=gov.nasa.stem

Geometry101

Free iPad app: https://itunes.apple.com/us/app/geometry101/id842528815?mt=8&uo=4&at=10l6SU

Free iPhone app: https://itunes.apple.com/us/app/geometry101/id842528815?mt=8&uo=4&at=10l6SU

Mathbeat

Paid iPad app: https://itunes.apple.com/us/app/mathbeat/id650849161?mt=8&uo=4&at=10l6SU

Paid iPhone app: https://itunes.apple.com/us/app/mathbeat/id650849161?mt=8&uo=4&at=10l6SU

Free iPad app: https://itunes.apple.com/us/app/mathbeat-free/id651402522?mt=8&uo=4&at=10l6SU

Free iPhone app: https://itunes.apple.com/us/app/mathbeat-free/id651402522?mt=8uo=4&at=10l6SU

iTooch Elementary School

Free iPad app: https://itunes.apple.com/us/app/itooch-elementary-school-math/id484570190?mt=8&uo=4&at=10l6SU

Free iPhone app: https://itunes.apple.com/us/app/itooch-elementary-school-math/id484570190?mt=8&uo=4&at=10l6SU

Quipper Quiz

Website: http://quiz.quipper.com/

Free iPad app: https://itunes.apple.com/us/app/quipper-quiz/id432308428?mt=8&uo=4&at=10l6SU

Free iPhone app: https://itunes.apple.com/us/app/quipper-quiz/id432308428?mt=8&uo=4&at=10l6SU

Free Android Phone app: https://play.google.com/store/apps/details?id=com.quipper.a.quiz

Rocket Science 101

Website: http://www.nasa.gov/externalflash/RocketScience101/RocketScience101.html

Free Android Phone app: https://play.google.com/store/apps/details?id=air.gov.nasa.ksc.RocketScience

Free iPhone app: https://itunes.apple.com/us/app/rocket-science-101/id536290350?mt=8&uo=4&at=10l6SU

Free iPad app: https://itunes.apple.com/us/app/rocket-science-101/id536290350?mt=8&uo=4&at=10l6SU

Telling Time

Free iPad app: https://itunes.apple.com/us/app/telling-time-free/id473879314?mt=8&uo=4&at=10l6SU

Paid iPad app: https://itunes.apple.com/us/app/telling-time-+/id489996367?mt=8&uo=4&at=10l6SU

Paid iPhone app: https://itunes.apple.com/us/app/telling-time-+/id489996367?mt=8&uo=4&at=10l6SU

Grid Drawing for Kids

Free iPad app: https://itunes.apple.com/us/app/grid-drawing-for-kids-lite/id581373862?mt=8&uo=4&at=10l6SU

Paid iPad app: https://itunes.apple.com/us/app/id580540970?mt=8&uo=4&at=10l6SU

Free iPhone app: https://itunes.apple.com/us/app/grid-drawing-for-kids-lite/id581373862?mt=8&uo=4&at=10l6SU

Paid iPhone app: https://itunes.apple.com/us/app/id580540970?mt=8&uo=4&at=10l6SU

Learning Gems – My Piggy Bank

Free iPad app: https://itunes.apple.com/us/app/learning-gems-my-piggy-bank/id510705651?mt=8&uo=4&at=10l6SU

Free iPhone app: https://itunes.apple.com/us/app/learning-gems-my-piggy-bank/id510705651?mt=8&uo=4&at=10l6SU

Paid iPad app: https://itunes.apple.com/us/app/learning-gems-my-piggy-bank/id503158902?mt=8&uo=4&at=10l6SU

Paid iPhone app: https://itunes.apple.com/us/app/learning-gems-my-piggy-bank/id503158902?mt=8&uo=4&at=10l6SU

Middle School Math 6th Grade

Free iPad app: https://itunes.apple.com/us/app/middle-school-math-6th-grade/id648551920?mt=8&uo=4&at=10l6SU

Free iPhone app: https://itunes.apple.com/us/app/middle-school-math-6th-grade/id648551920?mt=8&uo=4&at=10l6SU

Freckle Education

Website: https://www.freckle.com/

Free iPad app: https://itunes.apple.com/us/app/id708421745?mt=8&at=10l6SU

Mathspace

Free iPad app: https://itunes.apple.com/us/app/mathspace/id586612052?mt=8&uo=4&at=10l6SU

Website: https://mathspace.com.au/

NumberOne Brain

Free iPad app: https://itunes.apple.com/us/app/numberone-brain/id542634818?mt=8&uo=4&at=10l6SU

Free iPhone app: https://itunes.apple.com/us/app/numberone-brain/id542634818?mt=8&uo=4&at=10l6SU

Calculus Intro

Free iPad app: https://itunes.apple.com/us/app/calculus-intro/id692992711?mt=8&uo=4&at=10l6SU

Free iPhone app: https://itunes.apple.com/us/app/calculus-intro/id692992711?mt=8&uo=4&at=10l6SU

Math Logarithms

Free iPad app: https://itunes.apple.com/us/app/math-logarithms/id516234148?mt=8&uo=4&at=10l6SU

Free iPhone app: https://itunes.apple.com/us/app/math-logarithms/id516234148?mt=8&uo=4&at=10l6SU

Ruler

Free iPhone app: https://itunes.apple.com/us/app/ruler/id285894656?mt=8&uo=4&at=10l6SU

ScootPad

Website: http://www.scootpad.com/

Edmodo app: http://www.edmodo.com/publisher/scootpad

Google Chrome app: https://chrome.google.com/webstore/detail/scootpad/boihgpoojeingjbbdjmoocbdibophjap

Free Mac program: https://itunes.apple.com/us/app/scootpad/id493083432?ls=1&mt=12&uo=4&at=10l6SU

Free Android Phone app: https://play.google.com/store/apps/details?id=com.scootpad.app

Free iPad app: https://itunes.apple.com/us/app/scootpad/id557056479?mt=8&uo=4&at=10l6SU

Times Tables Game

Free iPad app: https://itunes.apple.com/us/app/times-tables-game-multiplication/id525325181?mt=8&uo=4&at=10l6SU

Free iPhone app: https://itunes.apple.com/us/app/times-tables-game-multiplication/id525325181?mt=8&uo=4&at=10l6SU

Free Android Phone app: https://play.google.com/store/apps/details?id=nl.wissapp.timestables

Andie Graph

Free Android Phone app: https://play.google.com/store/apps/details?id=net.supware.tipro

SAS Math Stretch

Free iPad app: https://itunes.apple.com/us/app/sas-math-stretch/id607137453?mt=8&uo=4&at=10l6SU

Free Android Phone app: https://play.google.com/store/apps/details?id=com.sas.android.mathstretch

Math Champ for Teachers

Free iPad app: https://itunes.apple.com/us/app/math-champ-host/id516219390?mt=8&uo=4&at=10l6SU

CK-12 studyNow!

Free iPad app: https://itunes.apple.com/us/app/ck-12-studynow!/id611509018?mt=8&uo=4&at=10l6SU

Chocolate Chip Cookie Factory: Place Value

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

DataAnalysis

Free iPad app: https://itunes.apple.com/us/app/dataanalysis/id375603883?mt=8&uo=4&at=10l6SU

OoO Calc: Order of Operations Calculator

Free iPad app: https://itunes.apple.com/us/app/ooo-calc-order-operations/id779001232?mt=8&uo=4&at=10l6SU

Free iPhone app: https://itunes.apple.com/us/app/ooo-calc-order-operations/id779001232?mt=8&uo=4&at=10l6SU

Clinometer

Free iPad app: https://itunes.apple.com/us/app/clinometer-hd-bubble-level/id364877623?mt=8&uo=4&at=10l6SU

Math Champ Challenge

Free iPad app: https://itunes.apple.com/app/math-champ-challenge-common/id566463831?mt=8&uo=4&at=10l6SU

Free iPhone app: https://itunes.apple.com/app/math-champ-challenge-common/id566463831?mt=8&uo=4&at=10l6SU