When compared to the screenshot from my iPod touch, the sheer size of the Ancestry.com app on my iPad looks massive!
This app is going to be great on my iPad because it is optimized for this type of screen. I think that because it is downloaded, it will not need the Web to be used. I have an iPad that is Wi-Fi only so I have to go outside my house to see.
I still don't know how I "refresh" when i make changes to my Ancestry tree which I do almost daily.