If you read the reviews for an app on the App Store before you buy it, you’ve probably been frustrated by the reviews posted by people who don’t even own the app. iPhone developers have also expressed frustration with this process, since poor reviews can lead to lower sales for their app. Well, no more! Apple has finally set up requirements to review apps - if you try to review an app that you have not purchased, you’ll see this message pop up in iTunes:

It’s unknown whether Apple will go back and remove the existing reviews from those who did not purchase or download the app in question (which could be quite a daunting task), but at least we now know that reviews from this point on will most likely be based on actual experience with the app.

Via Macrumors forums...