Is it possible to root my GS3 sprint 4.3 without using a computer

[gxyS3_918]

I know there are methods to root many phones including the s3 without having to use a computer. But I've tried a few different methods and nothing seems to work, framaroot, z4root, and poot all failed. I've done some research and I think it's because the KNOX software that is new to 4.3. Does anyone know a method that works without using a pc. And If not, what is the easiest method to use for a newbie like myself to do with a computer?