I Write Like (https://iwl.me), my popular writing style analyzer now has apps for iPhone, iPad and Mac. It uses Bayesian classifier to analyze your text and gives famous author similarities.
I made the first version of I Write Like in 2010. It went viral (https://en.wikipedia.org/wiki/I_...) and was mentioned in New York Times, The Guardian, Forbes, etc. Since then I rewrote it multiple times and open sourced the latest version of the algorithm (https://github.com/coding-robots...). I rewrote the same algorithm in Swift and made an iOS and Mac app. Please check it out!
I Write Like app