Some free apps for learning coding on Android:
1. **SoloLearn: Learn to Code**
- Offers a variety of programming languages and interactive lessons.
2. **Enki: Learn data science, coding, tech skills**
- Provides daily coding challenges and interactive lessons.
3. **Grasshopper: Learn to Code for Free**
- Focuses on JavaScript fundamentals with a gamified approach.
4. **Programming Hub: Learn to code**
- Covers a wide range of programming languages with interactive coding exercises.
5. **Khan Academy**
- Offers coding lessons along with various other educational content.
6. **AIDE - Android IDE**
- A mobile IDE for Android that allows you to write Android apps directly on your device
