[iOS] 2. Working with ATT (App Tracking Transparency / iOS)

Since iOS 14 Apple introduced the Apple Tracking Transparency framework, which requires that every app needs to expose which tracking data it uses. The ATT framework on its own is not compliant with the IAB TCF/GDPR, etc. and is only an apple specific version for asking user consent for tracking data. To enable the user a better experience we support a solution to synchronise the consents between the CMP SDK and the ATT interface . The SDK offers two different solutions for this. 

Requesting ATTracking with the Cmp SDK 

Depending on your workflow you can either call the ATT screen via your code logic or have the consentmanager iOS SDK do the call for you.

        cmpManager?.requestATTPermission(completion: { status in
            switch status {
                              case .authorized:
                                  // Tracking authorization dialog was shown and accepted
                                  // TODO custom code here:
                              case .denied:
                                  // Tracking authorization dialog was shown and permission is denied
                                  // TODO custom code here:
                              case .notDetermined:
                                  // Tracking authorization dialog has not been shown
                                  // TODO custom code here:
                              case .restricted:
                                  // Tracking authorization dialog has not been shown app is restricted for tracking
                                  // TODO custom code here:

This will show the ATT layer from the operating system.

We're recommending this integration. You're still able to get full control of the ATT interface and implement your customised process depending of the user.


Flag indicating whether App Tracking Transparency request is handled automatically during initialize function
cmpConfig.isAutomaticATTRequest = true

Make sure to activate this function before instantiation of the CMP SDK. 

If you not using ATT, you may have to take a note for the automatic Apple Review. Since the Apple ATT is integrated as an option but not used. Apple might not approve the Application automatically. For this we have a no-att version: Please check the newest version here:

Customizing the consent layer for ATT

In case when the user rejects the ATT request, the CMP can show a different message, vendorlist or purposelist. We recommend using a message that is customized for ATT and that does not include wording that leads the user to believe that tracking or advertising (or any other data processing for which ATT is relevant) is used.

The goal should be to avoid confusion in cases when the user already rejected tracking via ATT. In this case the user should not be confronted with a message or choice that could potentially (re-)enable tracking.

Customizing the text for ATT rejection

In order to customize the texts when the user rejected ATT, please go to Menu > Designs > Texts > (choose a language) and fill field "Text (ATT)". If the field is no-empty, the CMP will display this text instead of the original text in case when the user rejected ATT.

Disabling or removing purposes & vendors

In addition to the text changes we recommend to also disable or hide purposes and vendors that require ATT consent. In order to do so, please go to Menu > CMPs > Edit > Other settings > Privacy APIs and set the setting "ATT support" to "Disable selected purposes" or "Hide selected purposes". Once changed, please choose the purposes that should be hidden/disabled.

In addition to the purposes you could also hide/disable affected vendors via the setting "Vendor logic".

We recommend doing both: Hiding vendors and purposes if ATT was rejected.

Using a different design for ATT

In addition or in combination to the above, app developers can also set the system to use a completely different design in case when ATT was accepted or rejected. This allows for more flexibility in presentation and wording. In order to activate the ATT targeting, please go to Menu > Designs > Edit > Targeting and activate ATT-Targeting:

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