> The iHasApp iOS Framework allows you to detect installed apps on a user's device. Detection results can be in the form of an array of detected appIds, or an array of appDictionaries from the iTunes Search API.
I'd also bet you a coffee that you could pretty reliably uniquely fingerprint devices this way. I don't bear OP any ill will for writing iHazApp, but I can certainly see why many would be uncomfortable with it.
For some subset maybe. But I guarantee you that there is not one other person on Earth that has the same set of apps installed on their phone that I do. The chances of that are astronomically tiny.
I'm running a browser with only two (what I believe are common) add ons installed and a fairly uninteresting system config on common hardware. This is enough (combined with other "safe" metadata) to uniquely identify me! Compare this to iPhones, which frequently have dozens of apps installed and expose comparable device metadata.
