Ok, sorry for my absence. I feel that there's a lot of incomplete info, so here is my reasoning for everything I have said:
I need a Raspberry Pi because I intend to make a radio scanner with an antenna that plugs in via USB. It needs to run Linux because I have some software that I need to run on that device, which is not available on Android. Since my antenna attaches over USB, I need a device with USB ports, and I know USB OTG exists, but are those cheap devices compatible with it? I also have a RPi right here next to me, so it will just be easier and less expensive because I already have one.
I also needed a device that could also function as a graphing calculator too, and maybe play some light NES/Super NES/Game Boy games, but since the Pi I have is a Pi 3, I will probably be attaching controllers and playing N64.
I hope that clears it up.