React Native AI

Full stack framework for building cross-platform mobile AI apps supporting LLM real-time / streaming text and chat UIs, image services and natural language to images with multiple models, and image processing.

Check out the video tutorial here

Features

• LLM support for OpenAI GPT-5.2 + GPT-5 mini, Anthropic Claude Fable 5, Sonnet 5, and Opus/Sonnet/Haiku 4.5, Gemini, Z.ai GLM 5.2, and Moonshot Kimi K2.7
• Image generation with Gemini (Nano Banana)
• Real-time / streaming responses from all providers
• Server proxy to easily enable authentication and authorization with auth provider of choice.
• Theming (comes out of the box with 5 themes) - easily add additional themes with just a few lines of code.

Usage

Generate a new project by running:

npx rn-ai

Next, either configure your environment variables with the CLI, or do so later.

Running the app

Change into the app directory and run:

npm start

Running the server

Change into the server directory and run:

npm run dev

Environment variables

The server environment variables are available in server/.env.example. If already not present, update this file name to .env and configure server environment variables. Gemini image generation requires GEMINI_API_KEY.

Theming

To add a new theme, open app/src/theme.ts and add a new theme with the following configuration:

const christmas = {
  // extend an existing theme or start from scratch
  ...lightTheme,
  name: 'Christmas',
  label: 'christmas',
  tintColor: '#ff0000',
  textColor: '#378b29',
  tabBarActiveTintColor: '#378b29',
  tabBarInactiveTintColor: '#ff0000',
  placeholderTextColor: '#378b29',
}

At the bottom of the file, export the new theme:

export {
  lightTheme, darkTheme, hackerNews, miami, vercel, christmas
}

Configuring LLM Models

Here is how to add new or remove existing LLM models.

In the app

You can add or configure a model by updating MODELS in constants.ts.

For removing models, just remove the models you do not want to support.

For adding models, once the model definition is added to the MODELS array, you should update src/screens/chat.tsx to support the new model:

1. Create local state to hold new model data
2. Update chat() function to handle new model type
3. Create generateModelReponse function to call new model
4. Update getChatType in utils.ts to configure the LLM type that will correspond with your server path.
5. Render new model in UI

{
  chatType.label.includes('newModel') && (
    
  )
}

On the server

Create a new file in the server/src/chat folder that corresponds to the model type you created in the mobile app. You can probably copy and re-use a lot of the streaming code from the other existing paths to get you started.

Next, update server/src/chat/chatRouter to use the new route.

Configuring Image Models

Here is how to add new or remove existing Image models.

In the app

You can add or configure a model by updating IMAGE_MODELS in constants.ts.

For removing models, just remove the models you do not want to support.

For adding models, once the model definition is added to the IMAGE_MODELS array, you should update src/screens/images.tsx to support the new model.

Main consideration is input. Does the model take text, image, or both as inputs?

The app is configured to handle both, but you must update the generate function to pass the values to the API accordingly.

On the server

Gemini (Nano Banana)

Gemini image generation is handled in server/src/images/gemini.ts. Configure GEMINI_API_KEY and select the Nano Banana image models from the settings screen.

Other API providers

Create a new file in server/src/images/modelName, update the handler function to handle the new API call.

Next, update server/src/images/imagesRouter to use the new route.