Nit, in AUS, or Europe...in general, how many iPad apps do you find? You cant even get the Metro schedule on an iPad.
The issue is that the apps must go thru regulatory approval process, and approved by aircraft type, etc.
After that, the app must be written into the individual airlines sop and training prior for approval to be used.
As noted by the recent FAA guidance, anything other than approved and trained apps are illegal for use on the flightdeck.