Khan Academy v8.5.1

Khan Academy puts a personal tutor in every student’s pocket — completely free. Learn math from arithmetic to calculus, science, computing, economics, arts, and test prep for exams like the SAT, all in one app.

Lessons are short, friendly videos paired with interactive practice exercises that adapt as you go. The mastery system shows exactly where you stand on each skill, so you spend time on what you actually need.

Track progress with a personal learning dashboard, earn points and badges for consistency, and download lessons to study offline on the bus or anywhere without Wi-Fi.

Parents and teachers can create accounts to follow along, assign work, and spot where a learner needs help. Younger kids get a playful path through early math and reading fundamentals.

With millions of learners and a nonprofit mission behind it, Khan Academy is the rare app that’s both completely free and genuinely excellent for school, exams, and curiosity.