How To Create a Fitness Mobile App Like Strava?

I am interested in developing a fitness mobile application similar to Strava. I'm looking for guidance on the essential steps and technologies required to create such an app. Specifically, I would like to know about the key features, backend infrastructure, user interface design considerations, and any other important aspects to consider when developing a fitness tracking app. Additionally, insights into integrating GPS tracking, social networking features, and performance analytics would be appreciated.

Thank you.