# Legend State v3 > Fine-grained reactivity with persistence and sync built in. Make your app local-first, without the boilerplate. Documentation: v3 — current documentation. ## Pages - [Patterns](https://legend.so/state/v3/guides/patterns.md): Patterns — Legend State documentation. - [Performance](https://legend.so/state/v3/guides/performance.md): Performance — Legend State documentation. - [Introduction](https://legend.so/state/v3.md): Introduction — Legend State documentation. - [Fast 🔥](https://legend.so/state/v3/intro/fast.md): Fast 🔥 — Legend State documentation. - [Getting Started](https://legend.so/state/v3/intro/getting-started.md): Getting Started — Legend State documentation. - [Introduction](https://legend.so/state/v3/intro/introduction.md): Introduction — Legend State documentation. - [Why](https://legend.so/state/v3/intro/why.md): Why — Legend State documentation. - [Migrating](https://legend.so/state/v3/other/migrating.md): Migrating — Legend State documentation. - [Other Frameworks](https://legend.so/state/v3/other/other-frameworks.md): Other Frameworks — Legend State documentation. - [Fine Grained Reactivity](https://legend.so/state/v3/react/fine-grained-reactivity.md): Fine Grained Reactivity — Legend State documentation. - [Helpers and Hooks](https://legend.so/state/v3/react/helpers-and-hooks.md): Helpers and Hooks — Legend State documentation. - [React API](https://legend.so/state/v3/react/react-api.md): React API — Legend State documentation. - [React Examples](https://legend.so/state/v3/react/react-examples.md): React Examples — Legend State documentation. - [Tracing](https://legend.so/state/v3/react/tracing.md): Tracing — Legend State documentation. - [Crud plugin](https://legend.so/state/v3/sync/crud.md): Crud plugin — Legend State documentation. - [Fetch plugin](https://legend.so/state/v3/sync/fetch.md): Fetch plugin — Legend State documentation. - [Keel plugin](https://legend.so/state/v3/sync/keel.md): Keel plugin — Legend State documentation. - [Persist and Sync](https://legend.so/state/v3/sync/persist-sync.md): Persist and Sync — Legend State documentation. - [Supabase plugin](https://legend.so/state/v3/sync/supabase.md): Supabase plugin — Legend State documentation. - [TanStack Query plugin](https://legend.so/state/v3/sync/tanstack-query.md): TanStack Query plugin — Legend State documentation. - [Configuring](https://legend.so/state/v3/usage/configuring.md): Configuring — Legend State documentation. - [Helper Functions](https://legend.so/state/v3/usage/helper-functions.md): Helper Functions — Legend State documentation. - [Observable](https://legend.so/state/v3/usage/observable.md): Observable — Legend State documentation. - [Reactivity](https://legend.so/state/v3/usage/reactivity.md): Reactivity — Legend State documentation.