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> By default, users have a unique tracking/advertising ID attached to their phone. My understanding is that this tracking ID was a replacement for apps being a
by madeofpalk 7y ago
> By default, users have a unique tracking/advertising ID attached to their phone.
My understanding is that this tracking ID was a replacement for apps being able to obtain the devices serial number. The tracking ID is unique per developer (edit: not true, it is unique per device, so multiple devs can build a profile on you) and can be reset by the user at any time.
- KMnO4 7y agoI 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 agoThere 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 agoYes 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.