Comment by deergomoo

React Native renders actual native widgets to the screen, so for example on iOS you would write to cross-platform abstractions but you’d still get real UIKit components on the screen.

Flutter draws its own components that can look superficially like the target platform (or not, it’s up to the developer) in a manner closer to a game engine. HN seems to love Flutter and apparently the developer experience is excellent, but as a user I find Flutter apps to be in general a poor experience. They rarely look or act quite right (assuming the developers even try; I’ve used a number that look like someone has transplanted an Android app onto iOS).