MERITS: React native is a completely mobile friendly app (both iOS and Android). It helps you make apps faster with minimal compiling time. React native is native of intelligent debugging and reporting errors.
It is user friendly, time efficient and energy saver. It helps in huge sharing of knowledge, codes and resources. React Native also reuses the codes on different platforms.
DEMERITS: React Native is still under development and improvement and not completely matured. Miserable debugging during the layer of intersection of the platforms.
USES: Used in Facebook, Instagram and in many more..