The iPhone casino apps are some of the best gaming platforms available for download. Many of them are available on iTunes, other are organized for instant play, and there is an option to download non-authorized apps. There are many options to play for real using an app for your iPhone.
All of them are compatible with versions 4, 5, 5C, 6, 6 Plus and all next generations. However it's a good practice to read the technical requirements before install any app. The good practice says to install only authorized applications from trusted sources or proven mobile casino sites.
Many people prefer this method to play mobile games because they are more flexible with small icon on your screen and quick access to all casino games at any time.