It is design to be very user friendly as well as the availability of tools such as quizzes and games to further foster language learning. The latter includes Duolingo 200 Level Purse Challenge, which players can take on for fun or competitively to see who masters the most grammar and vocabulary words in an allotted time span (a month).
Voice recognition is also a helpful tool; it allows users to hear their pronunciation of words recorded by native speakers being repeated aloud through smartphones, computers, tablets – whenever they touch upon a word with no access to internet service.