I'm a big fan of Duolingo and I've been building educational apps for a year now. Almost all of my users complained about UI/UX on my apps. So this time I wanted to use Duolingo as a reference. I've been teaching speed reading for years so I had the teaching content ready. Even the app name is Speed Readingo :) The app is completely free, no ads and all data stored in device. I wanted to test out if its useful for people. If you're curious about speed reading I'd be super happy to teach one to one and get some feedback about the app