You're ready to create a new app that helps merchants create pre-order or TBYB options. To get started, you'll set up the foundation of your app.

To build a pre-order or TBYB app, you want to set up required access scopes and pages for the app. You want to have the following pages on the app:

- A page where merchants can create a pre-order or TBYB option
- A homepage where merchants can view a list of the pre-order or TBYB options that they created

## What you'll learn

In this tutorial, you'll learn how to do the following tasks:

- Set up required access scopes
- Create an app page
- Add navigation for app pages
- Add the empty state and title bar components to the homepage

## Requirements

> Note:
>
> - Most subscriptions, pre-order and try before you buy apps need to request API access through the [Partner Dashboard](/docs/apps/build/authentication-authorization/access-tokens/authorization-code-grant#ask-for-permission). We give API access to apps that are designed according to our [principles for subscriptions, pre-order and TBYB apps] (/docs/apps/selling-strategies/purchase-options#shopifys-principles).
> - Public apps that use subscriptions, pre-order or TBYB need to meet [specific requirements](/docs/apps/launch/app-requirements-checklist#purchase-option-apps) to be published on the Shopify App Store.
> - Custom apps [created in the Shopify admin](/docs/apps/build/authentication-authorization/access-tokens/generate-app-access-tokens-admin) can't use subscriptions, pre-order or TBYB because these apps can't use extensions or request access to protected scopes. If you're building a solution for a single store, then build your custom app in the Partner Dashboard.


- [Complete the tutorial to scaffold an app](/docs/apps/build/scaffold-app) and set up your development environment.
- Complete the tutorials to [create pre-order and TBYB (try before you buy) options](/docs/apps/build/purchase-options/deferred/build-deferment-solution) and [manage delivery profiles](/docs/apps/build/purchase-options/deferred/delivery-and-deferment/build-delivery-profiles).

## Step 1: Set up required access scopes

Your app requires the following access scopes:

- `write_products`
- `write_customers`
- `write_draft_orders`
- `write_purchase_options`

1. Navigate your app directory.

2. In the [`shopify.app.toml`](/docs/apps/build/cli-for-apps/app-structure#root-configuration-files) file, add the access scopes.

    <p>
    <div class="react-code-block" data-preset="file">
    <div class="react-code-block-preload ThemeMode-dim">
    <div class="react-code-block-preload-bar "></div>
    <div class="react-code-block-preload-placeholder-container">
    <div class="react-code-block-preload-code-container">
    <div class="react-code-block-preload-codeline-number"></div>
    <div class="react-code-block-preload-codeline"></div>
    </div>

    </div>
    </div>

    <script data-option="filename" data-value="shopify.app.toml"></script>

    <script type="text/plain" data-language="env">
    RAW_MD_CONTENTscopes = "write_products,write_customers,write_draft_orders,write_purchase_options"
    END_RAW_MD_CONTENT</script>

    </div>
    </p>



## Step 2: Update the navigation

Update the navigation links in the `app/routes/app.jsx` file. For more information on routing refer to [ui-nav-menu](/docs/api/app-bridge-library/web-components/ui-nav-menu) in the [App Bridge Library web components](/docs/api/app-bridge-library/web-components).

1. In `app/routes/app.jsx`, replace the content with the following code:

<p>
<div class="react-code-block" data-preset="file">
<div class="react-code-block-preload ThemeMode-dim">
<div class="react-code-block-preload-bar "></div>
<div class="react-code-block-preload-placeholder-container">
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
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<div class="react-code-block-preload-codeline-number"></div>
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<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
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<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
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<div class="react-code-block-preload-codeline-number"></div>
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</div>
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</div>
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</div>
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<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
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<div class="react-code-block-preload-codeline"></div>
</div>

</div>
</div>

<script data-option="filename" data-value="app/routes/app.jsx"></script>

<script type="text/plain" data-language="jsx">
RAW_MD_CONTENT
import { json } from "@remix-run/node";
import { Link, Outlet, useLoaderData, useRouteError } from "@remix-run/react";
import { boundary } from "@shopify/shopify-app-remix/server";
import { AppProvider } from "@shopify/shopify-app-remix/react";
import polarisStyles from "@shopify/polaris/build/esm/styles.css?url";
import { authenticate } from "../shopify.server";

export const links = () => [{ rel: "stylesheet", href: polarisStyles }];

export const loader = async ({ request }) => {
  await authenticate.admin(request);

  return json({ apiKey: process.env.SHOPIFY_API_KEY || "" });
};

export default function App() {
  const { apiKey } = useLoaderData();

  return (
    <AppProvider isEmbeddedApp apiKey={apiKey}>
      <ui-nav-menu>
        <Link to="/app" rel="home">
          Home
        </Link>
        <Link to="/app/create">Create</Link>
      </ui-nav-menu>
      <Outlet />
    </AppProvider>
  );
}

// Shopify needs Remix to catch some thrown responses, so that their headers are included in the response.
export function ErrorBoundary() {
  return boundary.error(useRouteError());
}

export const headers = (headersArgs) => {
  return boundary.headers(headersArgs);
};

END_RAW_MD_CONTENT</script>

</div>
</p>


## Step 3: Update app home page

Now that you've set up your app pages, you can use [Polaris](https://polaris.shopify.com) to build the user interface. You'll add the following components to the `app._index.jsx` file:

- [`EmptyState`](https://polaris.shopify.com/components/layout-and-structure/empty-state) is used to display the empty state before merchant can view their pre-order or TBYB options.
- [`ui-title-bar`](/docs/api/app-bridge-library/web-components/ui-title-bar) is used to show button actions to create pre-order or TBYB options.

In `app/routes/app._index.jsx`, replace the content with the following code:

<p>
<div class="react-code-block" data-preset="file">
<div class="react-code-block-preload ThemeMode-dim">
<div class="react-code-block-preload-bar "></div>
<div class="react-code-block-preload-placeholder-container">
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
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<div class="react-code-block-preload-codeline"></div>
</div>
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</div>
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<div class="react-code-block-preload-codeline"></div>
</div>
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<div class="react-code-block-preload-codeline-number"></div>
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</div>
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</div>
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</div>
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</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
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<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
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</div>
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</div>
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<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
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<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
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<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
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<div class="react-code-block-preload-codeline-number"></div>
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</div>
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<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>

</div>
</div>

<script data-option="filename" data-value="app/routes/app._index.jsx"></script>

<script type="text/plain" data-language="jsx">
RAW_MD_CONTENT
import { Page, Text, Card, EmptyState, BlockStack } from "@shopify/polaris";
import { useNavigate } from "@remix-run/react";

export default function Index() {
  const navigate = useNavigate();

  return (
    <Page>
      <ui-title-bar title="Pre-orders">
        <button variant="primary" onClick={() => navigate("/app/create")}>
          Create a pre-order
        </button>
      </ui-title-bar>
      <BlockStack gap="500">
        <Card>
          <EmptyState
            heading="Create a pre-order"
            image="/images/empty-subscriptions-list-state.png"
          >
            <Text as="p" variant="bodyMd">
              Pre-orders enable customers to purchase products with deferred
              payments or deliveries
            </Text>
          </EmptyState>
        </Card>
      </BlockStack>
    </Page>
  );
}


END_RAW_MD_CONTENT</script>

</div>
</p>


Your app's homepage displays the empty state and the title bar:

![deferred purchase option app homepage](/assets/api/purchase-options/app-homepage.png)

## Next steps

- [Create and add app components](/docs/apps/build/purchase-options/deferred/create-deferred-purchase-app/create-ui)