Trip Cost Finder calculates trip costs more effectively than other apps by checking for gas prices at several points of your trip instead of just once at the beginning, giving you the best possible estimate of your gas costs. You don't need to know the gas prices along your route; Trip Cost Finder gives you the most up to date ones just from your location.

Get the ad-free version at https://play.google.com/store/apps/details?id=com.tcff