In article John Smith writes:
Alan wrote:

It might be fun, but it is also quite illegal.

47 cfr 22.925 states:

What the hell is 47 cfr 22.925???

The FAA prohibits the use in flight

And what the hell is FAA???

Oh, I see! You've just forgotten that there's life outside the USA.

No, I just quoted the rules where I am, and where a large number of
the participants are.

I did, however, forget for a moment that the iPhone is now available
out there, too.

Now, if you can tell where *you* are, and provide the links to the
regulations there, we can check if it is legal there.

Alan