Foursquare – Android

Foursquare is your ultimate city guide, in your pocket. Find the best places to eat, drink, shop, or visit — in any city in the world. Access over 60 million short reviews from local experts. Traveling or looking to discover new places nearby? Get the free iPhone and iPad app today.

By Foursquare Labs, Inc

Update: Sep 16, 2016
468,615 ratings
Android 4.0.3 and up

Duolingo – Android

Learn English, Spanish, French, German, Italian, Portuguese, Dutch, Irish, Danish, Swedish, Russian, Ukrainian, Esperanto, Polish and Turkish — It’s fast, fun and free.
Practice speaking, reading, listening and writing. Play a game, answer questions and complete lessons to improve your vocabulary and grammar. Start with basic verbs, phrases, and sentences, and learn new words daily.

By Duolingo, Inc

Update: Sep 28, 2016
3,375,125 ratings
Android Varies with device

YouTube – Android

Get the official YouTube app for Android phones and tablets. See what the world is watching in music, gaming, entertainment, news and more. Explore the hottest videos on YouTube with the new trending tab. Subscribe to channels, share with friends, edit and upload videos, and watch on.

By Google Inc

Update: Sep 16, 2016
229,884 ratings
Android Varies with device