Certainly, learning anything with Khan Academy is great and fun but if you get to know that you can learn everything for free is really a great feeling for students and learners.
Salman Khan took an step for keen learners of any age and established Khan Academy in 2005, it is non-profit educational organization. The main goal of academy is to create online teaching courses for students and enthusiast learners.
This app also includes supplementary practice exercises and materials for educators. All resources are available to learners.
Above all, you can choose from a variety of subjects like grammar, history, math, science, economics, computing, finance, government, politics. Khan Academy is the perfect app for people addicted to learning.
You can learn anything. For free. For everyone. Forever.