Binance for Android
Binance came out with their app for Android phones rather early on. As such it has been in use long enough to remove smaller bugs and is now working rather smoothly.
It makes trading and overviewing of your assets very easy. Though, you should consider the size of your phone screen when it comes to any advance graphs analysis. However, they do offer a variety of tools to be used to get some useful information out of diagrams.
Their Android app is one of the best apps any exchange has to offer.