I鈥檓 just compiling Julia inside iSH for iOS which provides a virtualized x86 Linux environment. Will let you know how it goes (binary download of Julia was not working, see Julia won't start 路 Issue #259 路 ish-app/ish 路 GitHub ).
By the way, if it is possible to create something like full x86 emulation iSH (it uses a kind of JIT written in assembly) there must be some similar way to get Julia JIT to run natively with iOS restrictions. Anyone mad enough to dive into this ? 