[kazazes]

The lessons and exercises are limited in scope enough that they are entirely static. The work the app needs to do is limited to parsing, stylizing, checking (simple) syntax and matching user input to the task, not executing it. The lessons themselves are no more complex than a programming PPT presentation that looks prettier.

[Cyberdog]

All the more reason iOS is a bizarre platform for this, then.

[nilliams]

What's bizarre about it? Apple developers tend to own other Apple devices and are likely to want to learn Swift on the go.