You can try Apple's Maps app. (Does Google Maps have it to?) There is a 'ride-share' choice (or some similar terminology) when choosing route methods, and selecting it presents both Uber and Lyft (if you have the apps installed) and side-by-side price comparisons with the ability to book right there. It should be noted that integration with the Maps app is handled by Lyft and Uber themselves - they can choose what values to present to the user.