Due to the increasing use of smartphones among different groups of users in society as well as various capabilities that mobile devices provide for users, ensuring the security of smartphones is very important. Distribution markets of apps compromises the security of smartphones. Appstores play an important role in ensuring the security of smartphones and, if security requirements will be followed then they can protect users against malware developers. For this purpose, it is essential to identify security risks for this part of the app ecosystems. In this document, security risks raised in the app ecosystem in the field of app distribution markets have been explained.