Duolingo is the most popular way to learn languages in the world. Best of all, it's 100% free!
Idea: Have a "Duolingo Labs" page showing all A/B testing in progress and allow learners to try new features that are not activated in their account.
To avoid skewing the results of A/B testing, Duolingo could ignore data from learners who activate features via the "Duolingo Labs" page.
5 years ago