At this time, we are not supporting Smart Phones. If you are running Android 4.4 or higher or iOS 6.0 for Apple products on a 7" or larger tablets, then it should be compatible. Learn more from our wiki: <a href="https://wiki.roll20.net/Roll20_for_iPad_and_Android" rel="nofollow">https://wiki.roll20.net/Roll20_for_iPad_and_Android</a>