GSN's casino app is among other the highest-grossing apps in Google's and Apple's app stores. Game Show Network The majority of gambling apps for Android-powered devices are now available through Googlersquo;s Play Store. However, there are still some that may not be there since Google only recently allowed real money betting apps on its store. If thatrsquo;s the case, yoursquo;ll have to get the app directly from the online casino site. As long as you stick with reputable apps and sites like those we recommend, you have nothing to worry about. Apple is pretty strict when it comes to the apps that they list in their App Store, so that's another layer of security that's in place. Unsafe or dishonest iPhone casinos will quickly rack up negative reviews.