The Constant System is a decentralized global financial infrastructure that enables a new set of financial applications for consumers and businesses. At the heart of the Constant System, there is a decentralized, borderless, stable currency, called Constant. Constant is a cryptocurrency with 3 defining, differentiating characteristics that make it the ideal stablecoin. It is (1) a stable unit of account, (2) a secure store of value and (3) an efficient medium of exchange. Constant is not minted out of thin air; it is always backed by valuable assets. The first release of Constant is backed by the US dollar only, combining the creditworthiness and price stability of the US Dollar with the technological advantages of decentralized ledger technology (blockchain technology). By maintaining a strict 1:1 peg, Constant is 100% backed by its equivalent in USD, held in a fully audited Trust Vault, managed by an independent Trust Company. In subsequent releases, Constant will be backed by a broad variety of assets, including fiats like the US dollar and Euro, cryptocurrencies like Bitcoin and Ethereum, or tokenized assets like real estate and gold. Different from other cryptocurrencies, Constant is designed for useability and real world practicality. Constant is an upgraded money, a practical alternative that bypasses the limitations of fiat currency, built to integrate seamlessly into daily use. In this white paper, we outline the Constant System and its monetary policy, and also describe the first of many practical use cases and applications of Constant.