Amazon calculates a product’s star ratings based on a machine learned model instead of a raw data average. The model takes into account factors including the age of a rating, whether the ratings are from verified purchasers, and factors that establish reviewer trustworthiness.
I don't mind ads popping up. But when you encounter an ad that you can't close, but instead takes you to the app store because it thinks you tapped outside of the ( X ), then that is a problem.
This is why I gave it two stars. I was trying my hardest to give it a fair chance, but having to force close an app because of an ad that you can't close out knocked it down from either a three or a four star rating.