Similar App for Mathematics

Question

In Sololearn app users can give challenges to others. User may submit problems to extend sololearn challenge questions collection.

I wonder why there is no app exists for mathematics like sololearn.
I know "Khan Academy" but it is not engaging like sololearn in terms of challenges.

Or is there any possibility that sololearn will include mathematics one day?

Answer 1

@ Dev, thank you very much for that great link 👍😉

Answer 2

This is what you can use for Maths or any other subject, if you meant "free" by saying "like sololearn"... ;)

https://play.google.com/store/apps/details?id=org.khanacademy.android

Answer 3

I would say no, but if it is free and has the same methodology as "sololearn"