Well, I don't believe the game's PKE meter with the built-in Tobin is gonna get canonized, at least, not as having existed in 1991. It's too advanced, with the iPhone-based screen and all. In the fics, it'll probably be a brand new invention.
Especially since Fritz upgraded the PKE from the one the XGBs used to a model based on older cellphones, with a touchpad and wireless net access, a few years ago. So moving up from cellphone to iPhone feels like a natural evolution.