Comment by Qision

I recognize myself a lot when he talks about the feeling of losing knowledge acquired years ago. I would be very interested with MathAcademy if it can help me fight this! I am also wondering if it can help me learn new knowledge, especially new topics in maths I have never learned before?

Also what is the difference between MathAcademy and Brilliant? I have read many skeptical opinions on Brilliant, so it would be interesting to have a comparison.