Number Guru is an app that does what its developer, BeenVerified, says it can do: look up phone numbers that you enter and tell you, at least some of the time, who’s doing the calling. It’s the kind of reverse-lookup you can do on a multitude of Web sites, but with a few advantages.
Number Guru’s first advantage is that the app is simple, presenting a large keypad in a traditional layout with which you can enter a number, and it includes a backspace key to fix numbers incorrectly. The second advantage is that like some—but not all—of the Web sites that perform this service, Number Guru includes comments from others who have entered the same number, such as “Keeps calling my 11 year old’s cell phone at least 12x day.” That info can provide useful information on not only who is calling but how to block or prevent calls.
Read More - http://www.macworld.com/appguide/app.html?id=1159500&expand=true
