Blockchain app development refers to the creation of decentralized applications (dApps) that leverage blockchain technology for secure, transparent, and efficient transactions. These apps operate on blockchain networks and utilize smart contracts to automate processes. Blockchain app development includes designing user interfaces, integrating blockchain protocols, and ensuring data security. Developers create solutions for various use cases, such as finance (DeFi), supply chain tracking, and healthcare, ensuring that these apps are decentralized, scalable, and secure for end-users.