Vicilert app for iPhone and iPad

Vicilert app is Location-Based Services (LBS) app which notifies the user when targeted authorized user visits target location.
App users can add other vicilert app users or can send the invitation to his contacts to join app thru various modes. App user (sender) send a request to other app users (target) to notify the sender user whenever the target user is in the vicinity of the targeted location. This is where the user privacy is involved. Whenever the target user is in the vicinity of target location it notifies target user that somebody (sender) is interested to contacting you at the target location. The target user can ignore the request thus maintaining his privacy or accept the sender request. Once sender request is accepted, the sender knows target user location and it opens the various options for a sender to communicate with target user either by phone, WhatsApp, etc.