iOS is very restrictive and Apple has actively been working to thwart fingerprinting techniques, so you'd have a hard time going about getting something reliabl

iOS is very restrictive and Apple has actively been working to thwart fingerprinting techniques, so you'd have a hard time going about getting something reliably unique. If you are targeting older builds, there is stuff like this which is pretty neat [1]. [1] https://www.ieee-security.org/TC/SP2019/papers/405.pdf https://www.ieee-security.org/TC/SP2019/papers/405.pdf