Gforth fast, Gforth ITC, isn't there another? (Android launcher icons)

I've had Gforth on various Android devices for years. When I get new devices, Smart Switch copies much of the data including launcher icons. I've always had just 2 icons for Gforth named "Gforth fast" and "Gforth ITC". I rarely used "fast" because I read that it has reduced error checking; is this still true? (I don't need the speed in my interactive use.) "ITC", if I understand right, is for compatibility with something I've never needed. Is there not a third option on Android?