• You can use the IFA for measuring ad clicks and the IFV for measuring app installs.
• IFA has built-in privacy mechanisms that make it perfect for advertising. In contrast, the IFV is for developers to use internally to measure users who install their apps.

IFA

• ASIdentifierManager class provides

- **advertisingIdentifier: UUID**: An alphanumeric string unique to each device, used only for serving advertisements.

- **isAdvertisingTrackingEnabled**: A Boolean value that indicates whether the user has limited ad tracking.

IFV

• ASIdentifierManager class provides
• identifierForVendor: UUID: An alphanumeric string that uniquely identifies a device to the app’s vendor.

Find your device IFA and IFV here.