DUOLINGO. Is an App for language learning and provides language certifications. users can practice vocabulary, grammar pronunciation and listening skills, it is recommended for praticing your second or third language.

 Duolingo - La mejor manera de aprender un idioma a nivel mundial

DUOLINGO. is an American Educational Technology company which produces APPS for language learning and provides language certifications.

On its main app, users can practice vocabuylary, grammar, pronunciation and listening skills using spaced repetition. Duolingo offers over 100 total courses across over 40 distinct languages; including a small variety of constructed languages. The company uses a feemium model with over 500 million registered users. Duolingo offers a premium service which eliminates advertising and offers more features.

Duolingo also offers the Duolingo English Test certification program and a literacy app for children called Duolingo ABC, and the company released an elementary level math app called Duolingo Math currently exclusive to iOS.

This is a great tools to keep you second or third language learning and practice, at your own time and own pace. In any of your free time you can take your lessons and succed in your language adquisition.