Jcbwhth,
There is a lot that the app can't do. To make the game fit on a small screen they had to cut out a lot of information/options.
Personally, I use a browser to play the game, even when I'm on my phone. It means I have to zoom in a lot to see everything, but at least it actually lets you do everything you need to do.
Although, I do have the app for one thing. It lets you set up notifications to be sent to your phone. So I use it to give me alerts/notifications, but I respond to them, by using a browser.