I left a review for an app. I gave the app 4 stars because I was very happy with the support and functionality. However, I did criticise the app's appearance. Following the review, I was contacted by the developer to ask me if I had posted the review criticising the appearance of his app. After checking his site, I notice he had also contacted someone else to ask if it was them calling his app ugly. Is this appropriate? The app is part of a business and leads its target market. It isn't a developer creating it on the side, a reason why I was even more surprised to be contacted, or that the developer would even care.