I use Observer Pro with or without internet for planning, in addition to telescopius or SkySafari Pro when the internet is readily available. Observer Pro has a full database native to the app and lets you do lots of extra helpful things like entering your FoV based on different combinations of equipment to help you better frame shots, setting minimal viewing altitudes to avoid things like treelines or houses, and lets you filter on 10 or so attributes. Something like that is what I'd be looing for from the ASi Air app.
