We use TestFlight to test the internal executable files of iOS applications and beta testers.
When TestFlight sends an email alert to the user that a test binary is available, the web page to which he sends them automatically knows if the user is using a registered device, but it seems to be visible in Safari. How it's done?
It should match the UDIDs that we provided on their tool (through their website), but I had the impression that websites could not capture data such as UDIDs. How does TestFlight figure this out?
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