Identifier for vendor (IDFV)

Imagine if every app on your smartphone was a secret agent, assigned by its developer, with a badge number called the Identifier for Vendor (IDFV). It’s like a little secret code that tells all the apps from the same company to hold hands and whisper sweet nothings about you, but only when they're hanging out inside that company’s sandbox. So relax, it's less "big brother" and more "organized sibling rivalry."

The Identifier for Vendor (IDFV) is a unique code assigned by Apple's operating system to all the apps from the same vendor on a user's device. It is used to track user interactions and app performance consistently across an ecosystem of apps by a single company, without revealing any personal data. Unlike the Identifier for Advertisers (IDFA), which can be used by third parties for ad tracking, the IDFV is specific to the app developer, enhancing privacy controls while allowing for the measurement of user engagement across multiple applications created by the same company. If a user removes all apps from a vendor and reinstalls them later, the IDFV will reset, providing yet another layer of user privacy control.