vtiger

[dynamiqweb]

I am looking for a mileage module to add to vtiger, if one exists please point me in the right direction. I reviewed creating custom fields and adding them to a category but I would like something a little different.
I would like to add a mileage tracker to the dashboard and assign it to users to have a vehicle/mileage allowance. Any assistance would be helpful regarding something already in place if that is not the case, an introduction like to creating modules for vtiger would be helpful as well.