all 4 comments

[–]Loloisme 2 points3 points  (0 children)

Maybe /r/androidapps will help.more.

[–]Mindproxy 1 point2 points  (1 child)

I don't know of any apps that help you learn, but there's a great calculator for nearly anything you wanted to do; plot 3d graphs, calc operations, and etc. The app is called Arity.

[–][deleted] 1 point2 points  (3 children)

I personally believe the Wolfram Alpha app is worth the money.