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by gyardley 5194 days ago
If any of your apps has registered a custom URL scheme, and many do, any other app on your phone can easily check to see whether it's installed. That's by design.

Back when I was keeping up, it was also possible to read the mobile installation cache and get access to all of your installed applications, which is what some 'app recommender' applications did. That was an exploit which violated App Store policies - no idea if it still works.

1 comments

Ah, that makes sense, thanks.