I'm a big fan of extra amenities while flying. The availability and pricing of things like wifi, power supply for my electronic devices and refreshments are key factors in my choice when booking a flight. Currently I rely on my knowledge of airline products (i.e. Porter has free glasses of wine or beer, Norwegian in Europe has free wifi, most Delta flights in the US have wifi but there's a fee to access the service). Is there a search engine or booking site where I can compare the availability and or pricing of such extras as wifi or refreshments when booking a flight?
I know Google Flights does indicate the availability of wifi, but they don't differentiate between flights where wifi is free (Norwegian) vs. where there is a fee for this amenity (Delta), moreover I've never seen them indicate that Lufthansa's transatlantic flights offer wifi, but most do.