# App Builder: Domains

Understanding how to configure subdomains and manage custom subdomains is key to making your apps accessible to the world.

### Default subdomain structure

By default, all apps hosted on Rewst are assigned a subdomain under `*.rew.st`. This means your app's URL will be in the format `your-app-name.rew.st`. Rewst takes care of the underlying infrastructure, allowing you to focus on building and deploying your apps.

### Custom subdomains

#### Initial setup

When you first create your app, Rewst provides an option for a custom subdomain. This custom subdomain follows the pattern `<org-slug>-<custom-subdomain>.rew.st`.

* `<org-slug>`: This is your organization's unique identifier. You can update it in the Rewst Settings page for your organizations.
* `<custom-subdomain>`: You can choose a custom subdomain for your app during the creation process.

<figure><img src="https://1835401289-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FAQQ1EHVcEsGKBPVHmiav%2Fuploads%2FzbF3sYfguSOX2igjMqsp%2Fimage.png?alt=media&#x26;token=3fc52393-b527-432a-9c71-c9194d81eab5" alt=""><figcaption></figcaption></figure>

#### Update the organization slug

URLs on your App Builder pages are generated based on your organization slug within Rewst. If you wish to update your organization's slug:

1. Navigate to **Settings > Organization** in the left side menu of your Rewst platform. Do this for the organization you're using for your app.
2. Click ![](https://1835401289-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FAQQ1EHVcEsGKBPVHmiav%2Fuploads%2F3uAE9eDUXijDWgNVoF8S%2FScreenshot%202026-01-22%20at%2010.01.13%E2%80%AFAM.png?alt=media\&token=cf16508d-69cc-4d7d-b1d7-b6d0e16b06f0) to open the display options list.
3. Check the **Org Slug** column. \
   ![](https://1835401289-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FAQQ1EHVcEsGKBPVHmiav%2Fuploads%2FTUsiM0Q0XQWPjbTyag2s%2FScreenshot%202026-01-22%20at%2010.01.08%E2%80%AFAM.png?alt=media\&token=5908233b-64b6-4feb-960d-b151b686b98a)
4. Locate the organization slug field for your organization.
5. Click ![](https://1835401289-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FAQQ1EHVcEsGKBPVHmiav%2Fuploads%2FKjfENZmQYDud1ydbmdtw%2FScreenshot%202026-01-22%20at%2010.02.59%E2%80%AFAM.png?alt=media\&token=f912889a-5f21-4431-80cb-c762430d746a) to the far right of your organization to enable editing.
6. Update the org slug as needed.
7. Click ![](https://1835401289-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FAQQ1EHVcEsGKBPVHmiav%2Fuploads%2FwixOC38RzFUf1dGvzPJ2%2FScreenshot%202026-01-22%20at%2010.03.32%E2%80%AFAM.png?alt=media\&token=70f2f99e-49ed-4b32-af6f-e03f2b9785db) to save.
8. Changes will take effect immediately.

<figure><img src="https://1835401289-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FAQQ1EHVcEsGKBPVHmiav%2Fuploads%2FlXufB4IiojmeKt2piSIz%2FScreenshot%202026-01-22%20at%2010.04.33%E2%80%AFAM.png?alt=media&#x26;token=d2ec8acc-8a1d-437c-ac25-3ea27f32116b" alt=""><figcaption></figcaption></figure>

#### Update the custom subdomain

To modify the custom subdomain of your app:

1. Open your app in App Builder.
2. Look for the option to update the subdomain.
3. Enter your desired custom subdomain.
4. Confirm the changes.

<figure><img src="https://1835401289-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FAQQ1EHVcEsGKBPVHmiav%2Fuploads%2FiVMOl8cw1Nv2byWxbXst%2FScreenshot%202026-03-06%20at%2010.02.27%E2%80%AFAM.png?alt=media&#x26;token=ea214e6c-5ce7-428f-96cc-8f72c7705497" alt=""><figcaption></figcaption></figure>

#### Example:

Let's say your organization slug is `myorg` and your custom subdomain is `app1`. Your app's URL would be `myorg-app1.rew.st`.

### Why customize subdomains?

Custom subdomains provide a branded and personalized touch to your apps. It makes them easily identifiable and memorable for your users. Whether you're representing a business, project, or personal endeavor, a custom subdomain adds a professional touch to your online presence.

### Custom domain support and creation guidelines

Rewst offers custom domain support, allowing you to use your own domain name for your Rewst-hosted apps. Ensure that your custom subdomains comply with Rewst's guidelines and any applicable legal or branding standards. Abusive or inappropriate subdomains may be subject to action by Rewst.

{% hint style="info" %}
If you have suggestions for new App Builder features, or general feedback about your experience using this part of Rewst, submit your thoughts to our [Canny](https://rewst.canny.io/app-builder).&#x20;
{% endhint %}