What's New

- Introducing support for Bulgarian!
- Bug fixes and performance improvements.

App Description

You can learn anything. For free.

Spend an afternoon brushing up on statistics. Discover how the Krebs cycle works. Learn about the fundamentals of music notation. Get a head start on next semester's geometry fundamentals. Prepare for the SAT, GMAT, LSAT, MCAT, NCLEX-RN, and AP exams. Or, if you're feeling particularly adventurous, learn how fire-stick farming changes the landscape of Australia.

Whether you're a student, teacher, homeschooler, principal, adult returning to the classroom after 20 years, or a friendly alien trying to get a leg up in earthly biology — Khan Academy's learning library is available to you, for free.
- Learn anything, for free: Thousands of interactive exercises, videos, and articles at your fingertips. Study math, science, economics, finance, grammar, history, government, politics, and much, much more.
- Sharpen your skills: Practice exercises, quizzes, and tests with instant feedback and step-by-step hints. Follow along with what you're learning in school, or practice at your own pace.
- Keep learning when you're offline: Bookmark and download your favorite content to watch videos without an internet connection.
- Pick up where you left off: Your learning syncs with khanacademy.org, so your progress is always up-to-date.

Learn using videos, interactive exercises, and in-depth articles in math (arithmetic, pre-algebra, algebra, geometry, trigonometry, statistics, calculus, linear algebra), science (biology, chemistry, physics), economics (microeconomics, macroeconomics), humanities (art history, civics, finance, US history, US government and politics, world history), and more (including computer science principles)!

Khan Academy is a 501(c)(3) nonprofit organization, with the mission of providing a free, world-class education for anyone, anywhere.

iPhone Screenshots

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iPad Screenshots

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App Changes

  • April 24, 2012 Initial release
  • May 26, 2012 New version 1.1.2
  • November 24, 2012 New version 1.2
  • November 29, 2012 New version 1.2.1
  • May 21, 2013 New version 1.2.2
  • May 23, 2013 New version 1.2.3
  • July 05, 2013 New version 1.3.0
  • July 19, 2013 New version 1.3.1
  • August 04, 2013 New version 1.3.2
  • August 16, 2013 New version 1.3.3
  • September 20, 2013 New version 1.3.4
  • December 03, 2013 New version 1.3.5
  • December 14, 2013 New version 1.3.6
  • January 25, 2014 New version 1.3.7
  • February 13, 2014 New version 1.4
  • January 21, 2015 New version 2.0
  • January 29, 2015 New version 2.0.1
  • March 14, 2015 New version 2.0.2
  • April 15, 2015 New version 2.0.3
  • May 16, 2015 New version 2.0.5
  • May 21, 2015 New version 2.0.6
  • June 25, 2015 New version 2.0.7
  • July 04, 2015 New version 2.0.8
  • August 03, 2015 New version 2.1
  • August 06, 2015 New version 2.1.1
  • August 28, 2015 New version 2.1.2
  • September 09, 2015 New version 2.1.3
  • September 23, 2015 New version 3.0
  • September 23, 2015 New version 3.0.1
  • November 14, 2015 New version 3.1
  • December 01, 2015 New version 3.1.1
  • December 16, 2015 New version 3.1.2
  • December 22, 2015 New version 3.1.3
  • January 24, 2016 New version 3.1.4
  • February 04, 2016 New version 3.1.5
  • March 08, 2016 New version 3.1.6
  • June 22, 2016 New version 3.1.12
  • September 01, 2016 New version 4.0.1
  • September 21, 2016 New version 4.0.3
  • November 05, 2016 New version 4.2
  • November 15, 2016 New version 4.2.1
  • January 04, 2017 New version 4.2.2
  • January 30, 2018 New version 4.7.2
  • September 19, 2018 New version 5.1.1
  • June 13, 2019 New version 6.1.1
  • August 16, 2019 New version 6.2.0

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