In the mobile gaming ecosystem, an app store works as a major OTT distribution platform in today’s highly fragmented digital distribution channel. An app store distributes non-network mobile gaming applications under a downloadable format followed by a paid, free, or in-app-purchase model, or a combined model. The mobile game application then uses the mobile device’s platform to run the gaming software. The popular app stores are Google Play and Apple Appstore; however, there are other app stores who also played major roles in mobile game distribution such as independent app stores run on iOS or Android.