> For the complete documentation index, see [llms.txt](https://caseytechschool.gitbook.io/app-development-using-mit-app-inventor-platform/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://caseytechschool.gitbook.io/app-development-using-mit-app-inventor-platform/tutorial-2-creating-a-multi-screen-sos-app.md).

# Tutorial#2: Creating a multi-screen SOS App

In this tutorial, we will build a simple multi-screen SOS app using MIT App Inventor. The app will have three pages:

1. A home page with a navigation menu
2. A map page showing your location
3. An SOS page with a siren sound effect

The following image shows the app wireframe and navigation between screens.

<figure><img src="https://1663557159-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F5pNfTQ4i4gxcGBvuQAOz%2Fuploads%2FwSQAPgaEd4X10XHRHQd4%2FSOS.drawio.png?alt=media&amp;token=c6c3d84d-b30f-45ab-aca2-04845f7e3bdc" alt=""><figcaption><p>SOS app idea</p></figcaption></figure>

This tutorial is ideal if you have basic familiarity with App Inventor and want to learn how to create a multi-page app.

{% hint style="info" %}
Download the assets folder from HERE
{% endhint %}

{% hint style="info" %}
Download the completed project from HERE and import it on MIT App Inventor platform
{% endhint %}

### Prerequisites

Before starting, make sure you have:

* A beginner-level understanding of [MIT APP Inventor platform](https://appinventor.mit.edu/). If this is your first app making project, I recommend completing [Tutorial#1](/app-development-using-mit-app-inventor-platform/tutorial-1-image-hide-and-seek.md) first.
* An Android device with Internet access and location services enabled.

### Learning objectives

By the end of this tutorial, you will know how to:

1. Use the `Layout` component to create a navigation menu
2. Build and navigate between multiple screens
3. Display a map and mark your current location
4. Play sound effects like a siren noise

###