REV is a utility token based on Ethereum and Tron from Revain, a blockchain-based review platform that ranks companies in six categories based on user ratings and reviews. The platform's reviews are written in the blockchain, ensuring transparency and preventing review manipulation. Any crypto website can integrate the reviews using Revain Widget, and all user reviews appear on the Revain platform. The platform aims to provide high-quality and authentic user feedback on global products and services using blockchain and machine learning.