State Management in React Native: Keeping Apps Fast and Predictable

React Native apps re-render frequently: keyboard, animations, and navigation all touch the tree. Global state libraries are not interchangeable with respect to mobile performance; subscription granularity matters.

Local vs global state

Keep UI-local state in components or colocated hooks. Lift to global stores only for cross-screen concerns: auth, cart, feature flags, or cached server data.

Selectors and fine-grained updates

Whether you use Redux Toolkit, Zustand, Jotai, or Recoil, avoid passing entire store snapshots into list items. Subscribe to slices, memoize selectors, and pass primitive props into memoized rows.

Server cache layers

Pair UI state with a data library that caches server results (TanStack Query, RTK Query, etc.) so screens share normalized data without duplicating fetch logic.

Takeaway

Measure with React DevTools or why-did-you-render patterns in dev. The best architecture is the one your team can keep consistent—document conventions early.