Transpose: What is it going to take?

I am a newbie and I hope that someone will take the time to educate me if I'm wrong, and have misunderstood something. I have recently purchased both Notion and Progression for IPad and it is obvious that they share a lot of functionality. My question is: How difficult would it really be to implement the 'instrument transpose' function, that already exists in iPad Notion, in Progression?
I have looked through the forum and I realize I'm not adding anything new to the discussion, but It is difficult to understand why a dedicated guitar app wouldn't play guitar notes in the corrct octave.
May I also say that it is the potentially game changing excellence of this software, in terms of user interface and depth of functionality that make this oversight seem so egregious.
I have looked through the forum and I realize I'm not adding anything new to the discussion, but It is difficult to understand why a dedicated guitar app wouldn't play guitar notes in the corrct octave.
May I also say that it is the potentially game changing excellence of this software, in terms of user interface and depth of functionality that make this oversight seem so egregious.