Collects and sells data
Unable to monitor
App tracks location
What Duolingo says, "Learn Spanish, French, German, Italian, Russian, Portuguese, Turkish, Dutch, Irish, Danish, Swedish, Ukrainian, Esperanto, Polish, Greek, Hungarian, Norwegian, Hebrew, Welsh and English."
What SGS says, "We recommend this app for older beginner language learners due to some profanity or references to drugs or alcohol as you progress through the lessons."