@ajroach42 They *love* Pythonista.
It's not a bad environment for learning; there's a number of examples, auto indention / reformatting, code completion, a visual GUI layout tool, some iOS-specific modules, and the full Python docs included.
For code sharing, they use Air Drop to share projects and Working Copy to store history.
We haven't done much with Codea. The environment is really nice, but I haven't used Lua much, so I'm less comfortable helping them in it.