Something that the serious IF simmers and real life GA pilots on here could possibly find interesting. Found it while browsing the app store. Quoting the details about the app:
Pilot Wiz has been designed by GA pilots for GA pilots. It provides all of the basic conversions , calculations and key functions to keep you ﬂying safely.
It has most of the wizz wheel (E6B or CRP-1) functions. And more importantly provides Weight and Balance, Fuel calculations, Holding Patterns, Crosswinds, Weather Decoding and Route Planning. It can also operate in most international units.