I believe most app marketers must face a problem: how to choose a reliable app promotion company in the fierce competition? With there are many app promotion companies in the app marketing niche, it is difficult for app developers to choose a good one. Therefore, to solve this problem, there are some review sites emerging at the right moment. These companies list the top10 or more companies, introducing their service, costs, reviews and other factors to help you make a clever decision. Apppromotion is just this kind of website, you can learn the top10 app promotion companies and choose a suitable one.