Zustand is a small state management library that helps keep your React Native app fast and responsive. It uses simple hooks and avoids heavy re-renders, helping maintain smooth 60fps animations and interactions. Because it has minimal overhead, it uses less memory compared to bigger libraries, which helps reduce battery drain on mobile devices.
To keep your app running smoothly with Zustand, only subscribe to the specific parts of the state your components need. This avoids unnecessary updates and keeps rendering efficient. Use selectors and shallow comparison to prevent extra re-renders. Also, keep your state shape simple and avoid storing large objects or functions directly in the state.
Zustand is very lightweight (around 1-2 KB gzipped), so it adds almost no size to your app bundle. This helps keep your app's download size small and startup time fast. Smaller bundles mean users can open your app quickly, improving their experience especially on slower devices or networks.
Zustand works the same on both iOS and Android since it is a React Native library. However, performance differences may come from the underlying platform rendering engines. iOS uses UIKit and Android uses native views, but Zustand's minimal state updates help maintain smooth UI on both. Just ensure you test on both platforms to catch any platform-specific UI performance issues.
Using Zustand does not affect app store guidelines directly. However, ensure your app complies with Apple's Human Interface Guidelines and Google's Material Design principles for UI responsiveness and smooth animations. Also, keep your app's memory usage low to avoid crashes that can cause rejection. Zustand's lightweight nature helps meet these requirements.
If your app takes 5 seconds to load a screen using Zustand, likely causes include subscribing to too much state causing many re-renders, or storing large data directly in the state. Check if your components are updating unnecessarily and optimize by selecting only needed state slices. Also, consider lazy loading data or splitting state to improve load times.