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

# Track attribution and events

> Understand the attribution and in-app events Rey sends to AppsFlyer.

Once AppsFlyer is connected, Rey sends attribution-ready data so you can measure which campaigns bring valuable users to your app.

## Events Rey tracks automatically

| Event         | Description                                      |
| ------------- | ------------------------------------------------ |
| `app_install` | Fired on first launch after install              |
| `first_open`  | Fired the first time a user opens the app        |
| `screen_view` | Fired each time a user navigates to a new screen |

<Note>
  AppsFlyer attribution requires an app-store installation. It does not work for apps tested only in the Rey preview environment.
</Note>

## Send custom events

Use a **Track Event** action in Rey to capture moments that matter to your app, such as completing onboarding, making a purchase, or reaching a key feature.

<Steps>
  <Step title="Select the component">
    Choose the component you want to track, such as a button.
  </Step>

  <Step title="Open Logic">
    In the property toolbar, open the **Logic** tab, choose a trigger, and add a **Track Event** action.
  </Step>

  <Step title="Name the event">
    Enter the event name and any properties you want to include.
  </Step>
</Steps>

<Tip>
  Use consistent `snake_case` event names across iOS and Android. AppsFlyer treats `Purchase_Completed` and `purchase_completed` as different events.
</Tip>

## View attribution data

View installs by campaign, cost per install, return on ad spend, and in-app event counts in your AppsFlyer dashboard.

## Deep links and SKAdNetwork

Configure OneLink deep links in AppsFlyer under **Engagement & Deep Linking → OneLink**. AppsFlyer also supports Apple's SKAdNetwork (SKAN); configure SKAN conversion values in AppsFlyer when needed.