This will be an APK file that you can install yourself. Some sites will offer a direct download of an Android app from the site itself.
The best online casino apps for Android can be downloaded from Google Play in the US. The best online casino apps that pay real money can be installed and used on your phone or tablet, but, as is more common in the US, mobile sites can be used on such devices via a web browser such as Google Chrome. Online casino apps are apps or mobile websites that allow you to play casino games such as slots, blackjack, and video poker on iPhones and Android-powered devices. What are Casino Apps that Pays Real Money?