> For the complete documentation index, see [llms.txt](https://docs.january.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.january.ai/client-sdks/react-native-sdk/overview.md).

# Overview

Build food discovery, restaurant search, food analysis, voice capture, food, water, and weight logging, and glucose-prediction experiences from one typed TypeScript API. The package uses January's native Swift SDK on iOS and Kotlin SDK on Android through a React Native TurboModule.

## What you can build

* Food autocomplete, search, barcode lookup, food details, and alternatives
* Nearby restaurant and menu-item discovery
* Food analysis from a description, an image URL, or a base64 data URI
* Voice capture that turns speech into a food query or meal description
* Food-log creation, listing, summaries, updates, and deletion
* Water logs with daily totals, and weight logs with the latest weight per day
* Personalized glucose-impact predictions

## Requirements

| Component         | Requirement                                                                                                                                |
| ----------------- | ------------------------------------------------------------------------------------------------------------------------------------------ |
| React Native      | 0.83 or later (New Architecture, always on since 0.82)                                                                                     |
| React             | 19.2 or later                                                                                                                              |
| iOS               | 15.1 or later                                                                                                                              |
| Android           | API 24 or later, compileSdk 36; every app enables core library desugaring                                                                  |
| Android toolchain | JDK 17–21                                                                                                                                  |
| Expo              | Expo SDK 55 or later, in a development build (not Expo Go)                                                                                 |
| React Native Web  | Not supported; use `@januaryai/web-sdk`                                                                                                    |
| Your backend      | An endpoint that returns client tokens ([Backend token endpoint](/client-sdks/react-native-sdk/getting-started/backend-token-endpoint.md)) |

## Start here

1. [Install the package](/client-sdks/react-native-sdk/getting-started/installation.md).
2. [Add the token endpoint to your backend](/client-sdks/react-native-sdk/getting-started/backend-token-endpoint.md), or run the token relay for now.
3. [Write the token provider and create the client](/client-sdks/react-native-sdk/getting-started/authentication.md).
4. [Make your first request](/client-sdks/react-native-sdk/getting-started/quick-start.md).
5. [Turn a search result into a food you can log](/client-sdks/react-native-sdk/concepts/food-hydration-and-portions.md).

```ts
import { JanuaryClient } from '@januaryai/react-native';

const january = new JanuaryClient({
  endUserId: user.id,
  timezone: Intl.DateTimeFormat().resolvedOptions().timeZone,
  clientTokenProvider: tokenProvider,
});

const results = await january.foods.search({ query: 'greek yogurt' });
```