I've been doing some R&D with Xamarin Forms for the past few days, basically trying to create a screen from a design we used for an iPhone app. For the most part, I can get things laid out where I want them to be. The biggest inconsistency in terms of appearance right now is the fonts, they look smaller on Android than on the other two platforms.
I'm using the same NamedSize values for all of my labels currently. With Forms I know you are supposed to avoid explicit size values when possible, but I anticipate the predefined NamedSize values aren't always going to be what I need. To reach the highest level of detail, do I need to set an explicit numerical value on each platform until it looks right, or is there a better way? What is the best practice of setting font sizes in Xamarin Forms?