51CTO HarmonyOS Developer Community

Jan 6, 2026 · Mobile Development

Building a Cross-Device Health Diet App with HarmonyOS 6: Declarative UI, State Management & Performance Optimization

A developer shares technical insights from building 'Light Meal,' a cross-device health diet app on HarmonyOS 6, covering declarative UI with ArkUI, @ComponentV2 state management, performance optimizations cutting startup time 40%, service cards boosting daily active users 20%, and fine-grained permissions raising consent rates to 85%.