[_chrismccreadie]

All good points and I'm sure many of the app developers on HN will be able to give reasons as to why they are unable to provide this information on the apps they develop and I suspect it is all closely controlled by the platform as opposed to the developers themselves.

If the app I downloaded said "Our free version requires your location due to our arrangement with our Ad providers" I would have at least known why they were wanting my location.

I know this doesn't solve the problem, people will still have the choice to either accept it (albeit grudgingly) or uninstall the app. What it does do however is acknowledge they are asking for permissions to a users data. If someone asks for my permission to use my car is it unreasonable for me to know why they want it?