My hunch is that the main app page would convert better for getting star ratings. Have you tested both?
The potential problem with the reviews page is that it makes it seem to the user like they have to write a review in order to give a star rating. On the main app page, however, they can just provide a star rating.
The potential problem with the reviews page is that it makes it seem to the user like they have to write a review in order to give a star rating. On the main app page, however, they can just provide a star rating.