Quant Tutor
A strict math tutor for quant skills across five levels, from probability up to stochastic calculus, with drills and a mistake log.
Problem
Quant math is hard to learn on your own: textbooks jump ahead, answer keys make it easy to skip the work, and the same mistakes keep coming back.
Solution
It teaches five levels, from probability through stochastic calculus, uses spaced practice drills, keeps a log of your mistakes so you revisit them, and won't just hand you the answers.