Creating a unit conversion app

[Roger Ward]

So, I have my HP Prime, and I'm enjoying playing with the apps and marvelling at the graphing speed, but not marvelling at converting units! I can't even get CONVERT() to work in RPN mode...

So, a question - is it possible to create an app or program which would recreate the 48g-50g version of the units mode with soft keys etc?
I could switch into this mode when doing conversions as I do with my 48g.

I work in the heritage building sector so I'm converting between imperial and metric daily.

Any guidance appreciated, I may have to learn to program!