1. A system for using a geo-fence, the system comprising: a geo-fence server to: receive geographical coordinates of a device; determine that the device is located in a geo-fence; determine a type of the geo-fence, the type selected from a set of types including private geo-fences and public geo-fences, and the type designated in a user interface that provides an option to set the geo-fence as private or public; and transmit a notification to the device based on the type of the geo-fence.