Startup Idea: GPS-Based Reminder App for Daily Location Visits

Startup idea to develop a phone app that uses GPS tracking to monitor and remind users about daily visits to a specified location. The app triggers an alarm if the user hasn't visited the preset location by a certain time each day.

As part of my job, I need to drive to a certain location every day. Depending on orders for that day, I go at a different time each day, but I always go.

I need a phone app that uses the gps in my phone and determines whether I have gone to that location. Each day, if I have NOT already gone to that location that day, it triggers an alarm on my phone (at a preset time, say 4:00 - an hour before the end of the day - so I still have time to get to the location.).