> ## Documentation Index
> Fetch the complete documentation index at: https://meta-preview.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# App Data Parameters

> Learn about the app data parameters available in the Conversions API.

Use these parameters to share app data and device information with the Conversions API.

See the [Conversions API for App Events](/docs/marketing-api/conversions-api/app-events) documentation for guidance on integrating app events.

| Parameter                                                                                       | Description                                                                                                                                                                                                                                                                                                                                                     |
| ----------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| [`advertiser_tracking_enabled`](#)boolean                                                       | **Required for app events**Use this field to specify ATT permission on an iOS 14.5+ device. Set to `0` for disabled or `1` for enabled.                                                                                                                                                                                                                         |
| [`application_tracking_enabled`](#)boolean                                                      | **Required for app events**A person can choose to enable ad tracking on an app level. Your SDK should allow an app developer to put an opt-out setting into their app. Use this field to specify the person's choice. Use `0` for disabled, `1` for enabled. \`                                                                                                 |
| [`extinfo`](#)objectPlease use the down arrow to the right to see the list of `extinfo` values. | **Required for app events**Extended device information, such as screen width and height. This parameter is an array and values are separated by commas. When using `extinfo`, **all values are required and must be in the order indexed below**. If a value is missing, fill with an empty string as a placeholder. Note: - `version` must be `a2` for Android |

* `version` must be `i2` for iOS                   |
  \| `0`string                                                                                       | **Required**extinfo version Example: `i2`                                                                                                                                                                                                                                                                                                                                                                           |
  \| `1`string                                                                                       | app package name Example: `com.facebook.sdk.samples.hellofacebook`                                                                                                                                                                                                                                                                                                                                                  |
  \| `2`string                                                                                       | short version (int or string) Example: `1.0`                                                                                                                                                                                                                                                                                                                                                                        |
  \| `3`string                                                                                       | long version Example: `1.0 long`                                                                                                                                                                                                                                                                                                                                                                                    |
  \| `4`string                                                                                       | **Required**OS version Example: `13.4.1`                                                                                                                                                                                                                                                                                                                                                                            |
  \| `5`string                                                                                       | device model name Example: `iPhone5,1`                                                                                                                                                                                                                                                                                                                                                                              |
  \| `6`string                                                                                       | locale Example: `En_US`                                                                                                                                                                                                                                                                                                                                                                                             |
  \| `7`string                                                                                       | timezone abbreviation Example: `PDT`                                                                                                                                                                                                                                                                                                                                                                                |
  \| `8`string                                                                                       | carrier Example: `AT&T`                                                                                                                                                                                                                                                                                                                                                                                             |
  \| `9`string                                                                                       | screen width Example: `320`                                                                                                                                                                                                                                                                                                                                                                                         |
  \| `10`string                                                                                      | screen height Example: `568`                                                                                                                                                                                                                                                                                                                                                                                        |
  \| `11`string                                                                                      | screen density Example: `2`                                                                                                                                                                                                                                                                                                                                                                                         |
  \| `12`string                                                                                      | CPU cores Example: `2`                                                                                                                                                                                                                                                                                                                                                                                              |
  \| `13`string                                                                                      | external storage size in GB Example: `13`                                                                                                                                                                                                                                                                                                                                                                           |
  \| `14`string                                                                                      | free space on external storage in GB Example: `8`                                                                                                                                                                                                                                                                                                                                                                   |
  \| `15`string                                                                                      | device timezone Example: `USA/New York`                                                                                                                                                                                                                                                                                                                                                                             |
  \| [`campaign_ids`](#)string                                                                       | **Optional**An encrypted string and non-user metadata appended to the outbound URL (for example, ad\_destination\_url) or deep link (for App Aggregated Event Manager) when a user clicked on a link from Facebook. Graph API definition: Parameter passed via the deep link for Mobile App Engagement campaigns.                                                                                                   |
  \| [`install_referrer`](#)string                                                                   | **Optional** Third party install referrer, currently available for Android only, see [here for more](https://l.facebook.com/l.php?u=https%3A%2F%2Fdevelopers.google.com%2Fanalytics%2Fdevguides%2Fcollection%2Fandroid%2Fv4%2Fcampaigns\&h=AT2CfvoQs_VnxcNFkQ5MV8Qw9gDl5XxjQZTMhtHv_OBk1UiJAa0vSYP-rvlV6r3XZr5wOxpCv3oPxhsRTFPmh98LTMLiFDV-01L6hUdI7FUnzwXtlEtWchbn8JiaLDip8Z3zv3y5ajR4PBPG90VF2n4TUDg2VN-5SxJZag). |
  \| [`installer_package`](#)string                                                                  | **Optional**Used internally by the Android SDKs                                                                                                                                                                                                                                                                                                                                                                     |
  \| [`url_schemes`](#)array                                                                         | **Optional**Used internally by the iOS and Android SDKs.                                                                                                                                                                                                                                                                                                                                                            |
  \| [`vendor_id`](#)string                                                                          | **Optional**Vendor ID.                                                                                                                                                                                                                                                                                                                                                                                              |
  \| [`windows_attribution_id`](#)string                                                             | **Optional**Attribution token used for Windows 10.                                                                                                                                                                                                                                                                                                                                                                  |

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