No, you would not be able to use realm crafter and 3d world maker together, or indeed with any other TGC product to my knowledge. Realmcrafter is not actually a TGC product, they just sell it. It is pretty much dedicated to PC mmorgs, and you would have to use the tools provided to make games. You certainly won't be able to go multi device with it as far as I am aware.
The only TGC product that could do this is AGK/Freedom Engine as it is the only cross platform tool they provide. Everything else is mainly windows based. A game like you suggest would be very complicated to get to work and has been attempted before, just do a search for Savage (I think that was the games name.)
Most products TGC sell will be for Dark Basic or FPS Creator, but you will have to search about to see for yourself.