Navizon is a positioning system that combines WiFi and Cellular triangulations. The iPhone version relies solely on the built-in Core Location API. Buddy Finder to locate your loved ones at any time. Background location to let you track your phone or your buddies' phones even when Navizon is not running. Navizon Groups that let you see the position of users sharing the same interests. Navizon Alerts that let you trigger an event such as receiving an email or calling a URL.