After reading this article, you will understand how to enable your mobile users with the ability to calculate distances between their current location and a desired location.
The Distance Tracking setting in the Mobile Admin tab allows you to enable routing capabilities for mobile users. When enabled, a small map icon will appear to mobile users. It will display the distance (in miles) between the user's current location, and a geolocation on the Primary Object.
When end users tap on the map, the Google Maps application opens and provides directions to the destination.
To enable this setting, select Enable Distance Tracking in the Mobile Admin Tab, and then select a geolocation field from the Primary Object.