Ntro is another new Android app looking to connect you with nearby strangers who share the same interests as you. Once you register for an account, you can manually enter your favorite activities or interests or import them Facebook. You can be as general or specific as you want -- for example, say you're interested in travel or that you want to travel to Turkey. The site then matches you with others that you can message with based on similar interests. Unlike other social discovery apps, Ntro places a big emphasis on privacy--it doesn't share your real name or your location without your permission. As of now, Ntro is only available in Los Angeles and San Francisco, though it has plans to launch in other cities soon (New York, Boston and Washington D.C.). You can still use the app if you live elsewhere, but your matches may not live so close by.