Structure of an SSH binary packet

iOS is true Unix at every level. Apps are not run in a VM, and a jailbroken iPhone is vastly more powerful than an Android device. I've read people installing a C compiler on their iPhones and can compile almost anything that runs on Linux, even SSH into it, and I even saw someone running an X server and Firefox on one.

It's also nice if you like something simple that you aren't going to tinker with. So tinkerer, hacker or basic user, iOS is the best mobile OS out today (I am looking quite forward to Jolla and Ubuntu touch though).