I'm a beginner in mobile app development. Am planning to develop an app related to social networking. Curious to understand the best possible resources to start with. I see some websites like apparchitect.com which help to create a mobile app easily. But I'm not able to figure out how the backend works. Can anyone guide me on how I can proceed with UI and the backend? Are there any tools or platforms available in cloud which will help me to quicken my mobile app development especially social networking apps?