I will make a native iOS app, but probably only after this summer roadtrip season passes. as far as CarPlay goes, I'll have to find a way to test that first (all my cars/bikes have "dumb" head units). I have the site added to my homescreen on my iPhone and it works for me at least, same thing on desktop I installed the PWA with Chrome and have it in my dock
you're right that other providers don't understand through-waypoints. it's more problematic for groups than individuals, but I haven't wanted to take on live navigation yet because it's so hard to do right and to do real world testing. I could just trust Mapbox to be good enough with their Directions API, but then I'm not adding that much value and so I'm still going with planning/collaborating as my primary focus and encouraging folks to export to google/apple maps or their GPS for now. thanks for all the suggestions!