The best app ever
Out of all the educational apps this is my favorite! It ranges from all levels of difficulty and with many subjects and many courses. It works great and I use it to study for tests, and to help with homework. It explains things really well and the best part about it is that its FREE!! Thank you so much for creating this app. I use it so much and keep up the good work!!!
Alexis Tuan about
Khan Academy, v4.2.1