I'd say they're both hard. As an interface designer who works on iOS apps, it always pains me to see a web technology mobile app that's trying to look like it w

I'd say they're both hard. As an interface designer who works on iOS apps, it always pains me to see a web technology mobile app that's trying to look like it was built with UIKit but it's ever-so-slightly off. Some pixels are broken, text looks wrong, padding is off. I know why it's alluring, but I'd much prefer to see them craft their own interface style without aping Apple's UIKit look and feel. If someone is trying really hard to emulate a native app's interface but without native technologies, I think they're already doing it wrong. Focus on the UX, not taking a different framework's exact visual style and copying it pixel for pixel.