Both Lyft's website and app are defective. Lyft purports to offer fare estimates -- searching for "Lyft fare estimate" returns a page entitled "Get Fare Estimates for Your City - Lyft Price Estimate", but that page redirects to one that says "Let's start with your number" (in a large font); underneath (in a smaller font) it says "We’ll text you a link to download the app.", which obviously has nothing to do with providing a fare estimate. As it happens, I already have the Lyft app installed, but it has no option to provide fare estimates either; when I enter a starting location and destination and click "Done", the app displays a mostly blank page with an unlabeled button at the bottom and hangs. It's incredible that Lyft is able to do business with such miserable software -- it sure isn't doing any with me.
