Khan Academy

Khan Academyisn’t a traditional brain-training app, but it may be one of the most useful apps on this list. It helps you train your brain through actual learning instead of quick mental games.

The app gives you access to lessons created for a wide range of subjects. You can brush up on math, learn science concepts, revisit history, or study topics you never fully understood in school. The lessons are clear and beginner-friendly, which makes the app easy to recommend.

And the best part about Khan Academy is that it’s free to use. Yes, you read that right; you don’t have to pay for a subscription just to start learning. That makes it a great option for students or anyone who’s on a budget, or doesn’t want to invest too much money before knowing for certain if a subject is worth it for them.