> ## Documentation Index
> Fetch the complete documentation index at: https://docs.zerotwo.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Quickstart

Start using ZeroTwo on the web or in the desktop app.

## Where to use ZeroTwo

Use ZeroTwo across different surfaces, including the [ZeroTwo desktop app](/app) and [ZeroTwo on the web](/web). Choose the option that fits your work.

<div className="chatgpt-surface-cards not-prose">
  <a className="chatgpt-surface-card" href="/app">
    <span className="chatgpt-surface-card-media">
      <img className="block dark:hidden" src="https://mintcdn.com/zerotwo/aLDJ-xsJESNQtaVa/images/quickstart/desktop-light.webp?fit=max&auto=format&n=aLDJ-xsJESNQtaVa&q=85&s=308816cc20bf78872b7c5631d9992efa" alt="ZeroTwo desktop app" width="1672" height="941" data-path="images/quickstart/desktop-light.webp" />

      <img className="hidden dark:block" src="https://mintcdn.com/zerotwo/aLDJ-xsJESNQtaVa/images/quickstart/desktop-dark.webp?fit=max&auto=format&n=aLDJ-xsJESNQtaVa&q=85&s=97d051f6661b344179bf75726b30a675" alt="ZeroTwo desktop app" width="1730" height="909" data-path="images/quickstart/desktop-dark.webp" />
    </span>

    <span className="chatgpt-surface-card-body">
      <span className="chatgpt-surface-card-title">Desktop app</span>

      <span className="chatgpt-surface-card-desc">
        Work across projects, local files, and long-running tasks.
      </span>

      <span className="chatgpt-surface-card-badge">Recommended</span>
    </span>
  </a>

  <a className="chatgpt-surface-card" href="/web">
    <span className="chatgpt-surface-card-media">
      <img className="block dark:hidden" src="https://mintcdn.com/zerotwo/aLDJ-xsJESNQtaVa/images/quickstart/web-light.webp?fit=max&auto=format&n=aLDJ-xsJESNQtaVa&q=85&s=4cb7802083f73e6a33003d9e66dc15c8" alt="ZeroTwo on the web" width="1672" height="941" data-path="images/quickstart/web-light.webp" />

      <img className="hidden dark:block" src="https://mintcdn.com/zerotwo/aLDJ-xsJESNQtaVa/images/quickstart/web-dark.webp?fit=max&auto=format&n=aLDJ-xsJESNQtaVa&q=85&s=850b5800c9c28be37d735d93d3b772a7" alt="ZeroTwo on the web" width="1672" height="941" data-path="images/quickstart/web-dark.webp" />
    </span>

    <span className="chatgpt-surface-card-body">
      <span className="chatgpt-surface-card-title">Web</span>

      <span className="chatgpt-surface-card-desc">
        Work on complex tasks uninterrupted in the cloud.
      </span>

      <span className="chatgpt-surface-card-badge">No installation required</span>
    </span>
  </a>
</div>

Also available on [mobile](/mobile) and [cloud](/cloud).

## Setup

<Tabs>
  <Tab title="Desktop">
    The ZeroTwo desktop app is available for Windows, macOS, and Linux. Use it for projects,
    local files, Cowork, ZeroCode, and longer tasks.

    <Steps>
      <Step title="Install the ZeroTwo desktop app">
        Download ZeroTwo from [zerotwo.ai](https://zerotwo.ai/download/).
      </Step>

      <Step title="Open the app and sign in">
        Open ZeroTwo, then sign in with your ZeroTwo account.
      </Step>

      <Step title="Select where ZeroTwo should work">
        Start a chat, create a project, or open a folder. ZeroTwo can read and modify
        files in the folder you choose. [Learn more about chats and projects](/projects).
      </Step>

      <Step title="Start a chat">
        * For everyday work with a clear outcome, select **Cowork** (desktop) or **Work** (web).
        * For software development with codebase context, select **ZeroCode**.
        * For a quick question, select **Chat**.

        Learn more about [using ZeroTwo](/use-zerotwo).
      </Step>

      <Step title="Send your first message">
        Describe your goal and add any files or context ZeroTwo needs.

        ```text theme={null}
        Review the reports and notes in this project, compare the options, and create a one-page decision memo with a recommendation, risks, open questions, and source links.
        ```

        ```text theme={null}
        Inspect this app, identify one high-impact usability improvement, implement it, update the relevant tests, and verify the result.
        ```
      </Step>
    </Steps>
  </Tab>

  <Tab title="Web">
    ZeroTwo on the web includes Chat and Work.

    <Steps>
      <Step title="Open ZeroTwo and sign in">
        Go to [zerotwo.ai](https://zerotwo.ai) and sign in with your ZeroTwo account.
      </Step>

      <Step title="Choose Chat or Work">
        Select **Work** for multi-step tasks and deliverables. Select **Chat** for questions and drafts.
      </Step>

      <Step title="Send your first message">
        Describe the result you want and attach any files ZeroTwo needs.
      </Step>
    </Steps>
  </Tab>

  <Tab title="Mobile">
    Install ZeroTwo on iOS or Android, sign in with the same account, and continue chats from web or desktop.

    See [ZeroTwo on mobile](/mobile).
  </Tab>
</Tabs>

[Explore more use cases.](https://zerotwo.ai)

## Next steps

<div className="chatgpt-next-steps not-prose">
  <a className="chatgpt-next-step" href="/app">
    <span className="chatgpt-next-step-icon" aria-hidden="true">
      <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 20 20" fill="currentColor" width="20" height="20">
        <path d="M16.397 5.011a.17.17 0 0 0-.104-.157l-.058-.01c-2.304.074-3.673.477-5.57 1.503v10.025c.72-.373 1.404-.66 2.121-.87 1.043-.306 2.125-.439 3.454-.459l.058-.012a.17.17 0 0 0 .099-.155zM3.544 14.877c0 .095.077.165.156.166l.495.013c1.745.069 3.064.364 4.463.992-.604-.877-1.512-1.612-2.48-1.937v-.001a1.49 1.49 0 0 1-1.011-1.411v-7.71a10 10 0 0 0-.886-.114l-.554-.03a.173.173 0 0 0-.183.167zm14.182-.002c0 .756-.566 1.4-1.315 1.488l-.152.01c-1.248.02-2.205.143-3.1.405-.897.262-1.763.673-2.823 1.296a.67.67 0 0 1-.674 0c-1.948-1.146-3.343-1.605-5.533-1.689l-.448-.011a1.495 1.495 0 0 1-1.467-1.497V5.012c0-.858.718-1.525 1.557-1.497l.626.034c.282.023.525.055.77.093V2.51c0-1.06 1.122-1.864 2.143-1.353v-.001c1.476.74 2.755 2.174 3.224 3.759 1.825-.926 3.334-1.327 5.657-1.402l.159.004a1.497 1.497 0 0 1 1.376 1.494zM6.498 12.7c0 .073.046.13.105.15l.36.137c.89.373 1.718.999 2.372 1.764V5.582c-.247-1.204-1.199-2.425-2.377-3.106l-.242-.13c-.038-.02-.082-.021-.133.012a.18.18 0 0 0-.085.152z" />
      </svg>
    </span>

    <span className="chatgpt-next-step-copy">
      <span className="chatgpt-next-step-title">Learn more about the ZeroTwo desktop app</span>
      <span className="chatgpt-next-step-desc">Use the ZeroTwo desktop app to work with your local projects.</span>
    </span>
  </a>

  <a className="chatgpt-next-step" href="/import">
    <span className="chatgpt-next-step-icon" aria-hidden="true">
      <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round" width="20" height="20">
        <path d="M8 3 4 7l4 4" />

        <path d="M4 7h16" />

        <path d="m16 21 4-4-4-4" />

        <path d="M20 17H4" />
      </svg>
    </span>

    <span className="chatgpt-next-step-copy">
      <span className="chatgpt-next-step-title">Import your setup</span>
      <span className="chatgpt-next-step-desc">Bring supported setup, projects, and recent work into ZeroTwo.</span>
    </span>
  </a>
</div>