RentalCurrency (RENC) Coin is a specialized block-chain research community group located in Seoul and Singapore, group of researchers who develops rental services that can provide services by improving the lives of consumers, We have developed a platform to meet our needs and are constantly upgrading to create a credible currency that everyone can trust. Such a block-chain platform is basically based on ethereum block chain technology, and smart contract function is basically configured to secure stability according to consumption patterns and transactions of various consumers, and the solidity programming language.