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I don’t believe the IDFA is unique per developer (assuming I’m understanding you correctly). I use analytics in my company’s app and I get my team to send me t

by KMnO4 7y ago

I don’t believe the IDFA is unique per developer (assuming I’m understanding you correctly). I use analytics in my company’s app and I get my team to send me their IDFA by downloading a free app from the App Store. The IDFA in my analytics is the same IDFA in the 3rd party app.

VintageCool 7y ago
There is an IDFA (ID for Advertisers) and an IDFV (ID for Vendors). The IDFV is unique per developer; the IDFA is unique per device. The device user can reset their IDFA at any time, and if the user disables ad tracking then the device returns 00000000-0000-0000-0000-000000000000.
- banachtarski 7y ago
  Yes but in practice, users never do, and when they do a reset, fingerprinting employed by most (all?) ad exchanges can make the association without issue.