IDFV
IDFV is the acronym for Identifier for Vendor.

Identifier for Vendor
In the context of mobile app development and advertising, IDFV is a unique identifier assigned to a specific device by Apple. It allows app developers and advertisers to track user activity across multiple apps created by the same developer or organization.
Unlike the Identifier for Advertising (IDFA), which is used for targeted advertising purposes and requires user consent, IDFV is not tied to advertising and doesn’t require user permission. It’s primarily used for analytics and attribution within the same vendor’s ecosystem.
- Abbreviation: IDFV