Knowin: Learn Coding

KNOWIN: LEARN CODING is a free coding app for iPad that includes lessons in JavaScript (including basic coding structure/logic), Swift, Python, and Bash. It covers concept like variable, conditionals, loops, Booleans, functions, and arrays. It also discusses working in the command line. 

Knowin: Learn Coding manages to cover a lot of intro coding skills and it does so in an accessible and friendly manner.