A free program for Android, by Stefan Trenkel.
JavaScript Hero - Learn to Code for Free is a JavaScript tutorial app. Every lesson consists of an interactive exercise, a short text, and a link to another exercise. You can see your progress and find the answers to the exercises in the progress tab.
The app is suitable for beginners and advanced users. The beginner lessons help you get your first steps in programming. You can learn to code in a few days. You can also use the app to improve your programming skills.
JavaScript Hero is a fast-paced app that teaches you to code in a few days.
