Comment by lxgr
2 years ago
> Keychain storage doesn’t let FB track you
It sure lets app developers identify me across app deletions and reinstalls!
I'm also not sure why Apple has kept this loophole open for so long when they are otherwise so focused on making sure user tracking across reinstalls is so hard (e.g. by making APNs tokens change after a reinstall, which used to not be the case as well, restricting access to read the device MAC address and other permanent identifiers etc).
You can theoretically do that, but that's against app store regulations. I'd imagine that logging out first, then deleting the app, should prevent the behavior because afterwards there's very little reason to have any sort of lingering keychain data. But at the end of the day, it's basically an honor system.