Duolingo is one of the most famous apps to learn a new language out there. The app is well designed for your convenience, easily accessible and most importantly it is free. The app offers you lessons in 23 different languages and has over 170 million followers. The app has lessons broken down into smaller chunks for you to understand on daily basis making it feel more like playing a game. The app divides languages into different topics, such as clothing or business, but also into adverbs, pronouns, and other grammatical subjects. The text to audio parameter makes it well efficient to learn slowly and grammatically correct.