A free app for Android, by Education Center.

The Class 9 History NCERT Book in English provides you with a comprehensive learning experience that will enable you to acquire a better understanding of the events that took place in the past. It is an educational app that will help you learn more about the events that occurred in the past, and it is useful for students who are going to be taught in school. The app is also useful for students who want to learn more about history.

You can read all of the chapters in this book in English, and you can also listen to the audio for all of the chapters in this book.