I am creating an iOS app that has "SoS" functionality and alert based on user's moment/direction. In the app, first the user will set the destination and based on that it will plot the Apple map with directions as in below screenshot.
When the user starts moving as per the directions, I want to alert the SoS contacts if any deviation is there from the actual route (approx 100 meters range deviation)
I am using CLLocationManager to capture location of the user.
How can I keep track of the user as per the directions plotted?