Classy vs react-native-ui-kitten: What are the differences?

Developers describe Classy as "Expressive, flexible, and powerful stylesheets for native iOS apps". Not CSS. Instead of trying to force UIKit to fit CSS syntax, properties, conventions and constructs. Classy is a stylesheet system built from the ground up to work in harmony with UIKit. It borrows the best ideas from CSS and introduces new syntax, conventions and constructs where appropriate. On the other hand, react-native-ui-kitten is detailed as "Customizable and reusable react-native component kit". react-native-ui-kitten is a framework that contains a set of commonly used UI components styled in a similar way. The main idea of this framework is to move style definitions into a specific place making components reusable and styled in a single way. You just focus on business logic and it takes care of visual appearance.

Classy and react-native-ui-kitten can be categorized as "Mobile UI Frameworks" tools.

Classy and react-native-ui-kitten are both open source tools. It seems that react-native-ui-kitten with 4.38K GitHub stars and 565 forks on GitHub has more adoption than Classy with 781 GitHub stars and 86 GitHub forks.