It's a good idea to disable Location Services when not required, as these chew thru the battery even when the device is not being used.
I saw an advert for an ADSB receiver that plugs into an iPad, which means (at least in the USA) you'd get weather and traffic updates on your iPad.
In Australia I guess you could probably get much the same info over 4G/LTE using the BOM web site.
OzRunways still has plenty of rough edges, but is evolving very quickly. It'll be interesting to see where it is in a couple of years.