Im pretty bone to this so excuse my ignorence lol. But Come to think of it the Apexi uses a handheld controler like a blue fin so that could be the case? I just assumed as it wasn't mapped on a rolling road it was "live mapped" you've probably forgot more on the subject i'll ever know.
The Apexi is easy, any tuner can do it that is why we all charge around the £300 mark for such systems as it requires no investment at all and limited skill compared to live mapping an OE system with an emulator.