An application store tastemaker recommendation service is usable to determine experts within a user's social network(s), receive recommendations from the experts, and filter and/or rank mobile application query results based at least in part on the recommendations. Additionally, the service may be usable to determine experts based on data compiled about previous actions, reviews, comments, etc., of the experts. Further, the service may be usable to provide recommendations to the user to aid in selecting mobile applications for purchase, and may provide an avenue for completing such purchases.