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, or NCLEX-RN. 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, 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, humanities (art history, civics, finance), and more!

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

What’s New

Version 6.1.1

- Introducing support for German!
- Introducing support for Polish!
- Bug fixes and performance improvements.

Ratings and Reviews

4.0 out of 5
3.6K Ratings

3.6K Ratings

unhappy attempt ,

Glitching problems with touch interface

The app is lovely in concept and extremely helpful. Unfortunately, there are a number of issues when attempting to select choices and scroll during tests/quizzes. First off, when needing to match the correct answer with the correct statement, the app wants you to drag and drop the choices to where they should go; when you attempt to select a choice by pressing on it, instead of selecting the choice, the phone thinks you are attempting to scroll and refuses to recognize the held choice. This also happens with variables when you need to hold down said variable to access the other ones. (i.e. hold down x to reach y) The worst problem I have encountered is when presented with answers on number lines (as with inequalities), the number lines don’t appear! Instead the “glitch/fade” in and out occasionally if you scroll around for a while, sometimes never appearing at all resulting in forced guessing of answers. Please fix this, I hate redoing tests that I don’t have to!

Developer Response ,

Hi there!

I'm sorry for any trouble this may be causing you.

Could I suggest that you try uninstalling/reinstalling the app? If the issue persists, we would be more than happy to investigate further, please reach out to our support team!

Thank you for your interest in helping to improve Khan Academy!

rslitman ,

Looking for a Developer Response

Pretty good app. I am giving it five stars, even though a recent update put everything in deeper layers. I used to be able to see every video, article, and practice exercise for a course, plus its mission if it has one, on the same screen. Now I have to dig deeper. Please return an expanded view to us! Also, we no longer see our consecutive days streak.

The iPad app is missing a few things found in the web version, in addition to the consecutive days streak, but it is quite adequate for the learning experience.

The most maddening thing is that when you roll out a new version with a major change like this, you still say “Bug fixes and performance enhancements.” Please give this review a Developer Response and let us know that you will {in the future/in future} be detailed with your updates when something major like the whole interface changes. Also, please let us know why the consecutive days counter (more motivating to me than energy points and about as motivating as the badges) was removed and if there’s a chance we can get it back. Thanks!

Damascus Skylar ,

One star. Trying to get a major flaw fixed

First off I absolutely love the service Khan Academy provides. It is truly an education that fully takes advantage of modern technology. That said, there are some big issues so I’m submitting one star so that they can be fixed soon.
The app has not been optimized for iPad Pro. It simply scales from the normal iPad size so everything is pixelated. It’s not terrible but very distracting. Also multitasking would be nice. Please fix this issue.
Please add an undo button to the sketch pad.
Please please please update the home screen so that users can jump right back into whatever they are focusing on in the program. The current screen is good for an overall view of all content on Khan Academy but not for the welcome/home screen. Please change it to where it shows recent missions, bookmarks and selected missions/courses. Also the slides at the top are irrelevant to me and are never updated so please either have them update based on what’s popular, things I do or just randomly or better get rid of it and take advantage of all that space for other things.
Thank you for the consideration and all the hard work. I’ll be sure to change my rating when these issues are addressed (they don’t have to be with the solutions I recommended just as long as the issues and ui are made better).

Developer Response ,

Hi there!

Thank you so much for taking the time to provide feedback on your experience with the Khan Academy App and for wanting to help us improve!

We'd love to hear your feedback in detail in our discussion section on the site, there it can be voted and commented on by other Khan Academy members with whom this may resonate with and get more exposure.

Please access this URL:

Warm Regards,


Khan Academy
78.8 MB

Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.


English, French, German, Indonesian, Norwegian Bokmål, Polish, Portuguese, Spanish, Turkish

Age Rating
Rated 4+
© 2019 Khan Academy


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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