No button for theory in the mobile app
when I want to read more about what I am learning, there is no button on the upper right corner of the lesson.. I can't access from the mobile app
Thanks @LorraineHe603972, but the bigger point is Duolingo's mission to be the world language educator. And a lot of people's only computer is their phone...
The app has tips and notes too. You ckick the lightbulb icon when you pick topic