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Foursquare Labs Inc., commonly known as Foursquare, is a geolocation technology company and data cloud platform based in the United States. Founded by Dennis Crowley and Naveen Selvadurai in 2009, the company rose to prominence with the launch of its local search-and-discovery mobile app.
Foursquare app running on a Pebble Steel smartwatch. Foursquare uses proprietary technology, Pilgrim, to detect a user's location. When users opt in to always-on location sharing, Pilgrim determines a user's current location by comparing historical check-in data with the user's current GPS signal, cell tower triangulation, cellular signal strength and surrounding wifi signals.
Location and check-in data collected in Swarm are used to improve a user's recommendations in Foursquare City Guide. Splitting check-ins and general location sharing into the separate Swarm app was designed to let the main Foursquare app focus on exploring and discovering information on locations in a Yelp-like fashion. [5]
I've written previously on DailyFinance about Gowalla, the pretty check-in also-ran that was the second-largest mobile social network after Foursquare. Austin, Texas-based Gowalla hasn't been ...
Jacobi's four-square theorem giving the number of distinct ways an integer can be represented as the sum of four squares Euler's four-square identity or theorem, the product of two numbers, each of which is a sum of four squares, is itself a sum of four squares.
My Town, a relatively new social gaming app for iPhone, encourages users to check into real-world locations to level up, unlock achievements and earn cash to buy their favorite real-world places.
The four-square method refers to the dealer making four squares on a piece of paper. The squares contain the following figures: The value of your trade-in. Your down payment.
[4] [7] After Google abandoned the Dodgeball project in 2007, [8] [9] Crowley found work at a company called Area/Code where he met Naveen Selvadurai and co-founded Foursquare in 2009. [ 2 ] [ 10 ] Foursquare, known for its location intelligence offerings for both enterprises and consumers, is used by more than 50 million people every month. [ 11 ]