# Build user settings page for Ecwid admin
When users open your Native app, Ecwid opens your **settings page** inside an iframe. The app must go through authentication and initialization to show your settings page.
### Initialize the app
The `EcwidApp.init()` method is **required**. Call it once when the **iframeUrl** is opened. If it's not called, then Ecwid won't show the app. Your **iframeUrl** will load on a separate page but won't work inside Ecwid admin.
```
EcwidApp.init({
app_id: "client_id", // client_id of your application
autoloadedflag: true,
autoheight: true
});
```
Add your app *client\_id* as *app\_id* value. Leave *autoloadedflag* and *autoheight* fields with *true*. For most applications, it will be enough.
Read more about `init()` function and other functions available with [Native app JS SDK](/launch-apps/native-and-external-apps/build-user-settings-page-for-ecwid-admin/use-native-app-js-sdk.md).
### Show page to users
Now the app can show its **settings page** to users. Add `EcwidApp.init()` and JS file from Native app SDK in the ``. Add JS and CSS files for CSS Framework to `` and ``.
We have an HTML template with up-to-date versions of all required files. Use it to get started:
```html
Show something
```
### Use Ecwid CSS Framework
Native apps become a part of an Ecwid admin, so they must look accordingly. Our [CSS Framework](https://developers.ecwid.com/ecwid-css-framework/) has a large collection of ready-to-use UI elements and blocks. Use it to create an interface matching Ecwid admin faster and easier.
To access CSS Framework elements inside the Native app, add the required CSS and JS files to the page:
``:\
`https://d35z3p2poghz10.cloudfront.net/ecwid-sdk/css/1.3.19/ecwid-app-ui.css`
``:\
`https://d35z3p2poghz10.cloudfront.net/ecwid-sdk/css/1.3.19/ecwid-app-ui.min.js`
Code example:
```html
Native app page
```
---
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```
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