Preparation Phase - Clearly define requirements: Determine the app's functions and target user groups, such as financial applications for digital currency trading or traceability applications for tracking supply chain information [2] - Technology selection: Choose appropriate blockchain platforms and development languages, with common platforms including Ethereum and Hyperledger Fabric; development languages vary by platform, such as Solidity for Ethereum smart contracts and Java or Swift for mobile app development [2] - Team formation: Assemble a team that includes blockchain developers, mobile application developers, UI/UX designers, and testers [3] Design Phase - Architecture design: Plan the overall architecture of the app and determine the interaction method between the blockchain network and the mobile end, such as using RESTful API or WebSocket for data transmission [4] - Database design: Design a local database to store user information and transaction records, while considering synchronization mechanisms with blockchain data [4] - Interface design: Create a simple, aesthetically pleasing, and user-friendly interface, focusing on user experience to ensure smooth operational processes [5] Development Phase - Blockchain infrastructure setup or integration: If choosing to build a blockchain network independently, configure nodes and set consensus mechanisms; if integrating with an existing platform, follow the platform documentation for integration [6] - Smart contract development: Write smart contracts using the selected language to implement business logic, such as creating tokens and managing assets, followed by rigorous testing [6] - Mobile development: Based on design drafts, use the appropriate development languages and frameworks to develop the app's front-end and back-end, enabling user registration, login, transaction operations, and data display [6] - Interface development: Create interfaces between the blockchain network and the mobile end to ensure secure data transmission and interaction [7] Testing Phase - Functional testing: Conduct comprehensive testing of all app functions to ensure normal operation and compliance with design requirements [8] - Performance testing: Evaluate the app's response time, throughput, and other performance metrics under different network conditions, optimizing system performance [9] - Security testing: Check for security vulnerabilities in the app, such as preventing hacking attacks and data leaks, to protect user assets and information [10] Launch and Maintenance - Launch release: Submit the tested app to app stores for review, and officially launch it after approval [11] - Continuous maintenance: Monitor the app's operational status, promptly fix vulnerabilities and faults, and continuously optimize and update app functions based on user feedback and market changes [11]