Codecademy and Mimo have a similar structure. When I’ve used them, I found it hard to come back regularly because much of learning code is longer form than basic sentences or dialogue which is often further down the line for Duolingo.

This one is nice for python: https://play.google.com/store/apps/details?id=python.learnpython.learn.pythonx.coding.programming.python3.tutorials.codingx