Time Travelling Theory is an Android application developed by Command Centre under the category of Education & Reference. The program provides a comprehensive explanation of Einstein's theories of special and general relativity, including how time slows down or speeds up based on relative movement and how gravity can bend time. This educational book is an excellent resource for anyone interested in understanding the basics of Einstein's theories.

The user interface of Time Travelling Theory is easy to navigate, with a well-organized layout and readable text. The application provides a clear and concise explanation of the theories, making it easy for beginners to understand. The program is available for free and can be downloaded from the Google Play Store. Overall, Time Travelling Theory is a great tool for students, teachers, and anyone interested in learning more about the fascinating world of physics.