I am learning so much in the codeacademy about how to code. I had many doubts about how to start and I didn't begin to dedicate to learn. I was too lost. Then , I found this website and I'm learning in a fluid way.
At this moment, I searched in the Play Store (Android) if there was an app of the codeacademy, but I didn't find. I think it doesn't exist. But here is my suggestion: If it is possible, develop an app of the codeacademy. Many people use the smartphone so much and spend many hours a day with them, then I think with app the possibility to spend more hours learning how to code is largest.
I know that develop a great app with this content is a hard work, but maybe it might be worth.
(Sorry for my english, i'm brazilian and i'm trying to improve my english to talk with the international community)