Road Trip Gas Money Calculator

Just purchased this app. All I see is a rudimentary calculator where you type in the trip miles and then type in your vehicle mpg. That’s not worth paying for. It appears I was misled by the app were there before purchase is a screenshot of a map where it looks like you can put in your destination, and that would give you the number of miles. Without that functioning, this is not worth the effort to click “download” Developer Nick, please explain!

Purchased app and used it first time. My fault for not thinking. Does not save default information, or the option to save calculations you run. You must refill all fields - every time. FYI