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So, we all know Apple forbids using private or undocumented APIs in iOS apps. I have no problem with this, as there are sound technical reasons for why this is a good idea. However, twice now I've had an app rejected for using private APIs, when this was not actually the case. It's not difficult -- the private APIs include symbols like connectionState , setThumbnail , setOrder and so on. Any calls you make to methods named as such will be flagged as a private API use, even if the method being called is something you have defined yourself. For a program doing something with connections, thumbnails or the order of things, the above mentioned method names aren't all that unlikely. Getting rejected for this and having to rename a method and resubmit delays everything by at least a week while you wait for a new review. So is there a way, using nm , class dumps of the iOS frameworks, etc to find out for yourself if your method names conflicts with anything in there? If s