Bro uses a Nokia 6xxx cell running Symbian S60 OS.
Bro needs an aviation calculator.
Can I write one for the other?
Let's keep looking.
(A few googles later)
There seem to be many available, some for free:
But neither do I want to pay, nor do I want anything for Windows Mobile. Let's keep looking. I am thinking either Carbide.vs or getting an applet (as opposed to writing it). Which will it be? The plot thickens.