Ipad Clip studio trouble

  • Ok, I have Clipstudio installed on my Ipad. But I don't have it on my PC (i don't need it now since i work on Ipad only). Mobile app not connected to any common cloud services. I can open .lip files sending it from dropbox or icloud. But how to deal with 3d files? Or any specific files which are not associated with CS. Does developer suppose me to buy both versions, no matter i need it or not?