Loopt started when Sam Altman walked out of class at Stanford University and wondered, “where are all my friends?” Since that question popped into Sam’s head in 2005, the innovation hasn’t stopped. Loopt has become an essential app for more than five million people who want to find out the need-to-know info about their city.

We make you an insider wherever you go. Loopt Qs are the super social way to get bite-sized reviews and share your own opinions about the place you’re at — making you a true insider wherever you go. Qs offer real-time community answers to common questions, like: Is there a long line? What’s the best happy hour special? Is this place WiFi-friendly?

We bring you sweet deals. Loopt will alert you if there are deals nearby, so you can save money or get free stuff. In the past, Loopt’s partners have given away free music, plane tickets, XBOX Kinects, and much more. Loopt is the most simple way to find deals.

We help you find your friends. Loopt improves your experience in the real world. With Loopt, you can see (literally, see!) where your Loopt and Facebook friends are on the Loopt Friends Map. Also your “I’m running late!” or “happy hour?” text messages are paired with your location (a ‘Ping’), making meeting up an absolute breeze. Loopt can alert you with a “Friend Alert” when a pal is nearby, creating exciting moments of serendipity that, without Loopt, might never happen.

Loopt is headquartered in Mountain View, Calif. The Loopt application is available on a variety of devices and is most popular on iPhone and Android. See the list of supported mobile devices. Loopt is currently only available in the United States.