I am currently assigned for a task that requires me to build a mobile app/client, based on existing SharePoint server. All I have so far is the idea to build the app using Xamarin on Visual Studio and later I might connect it with SharePoint.
Can anybody explain to me the steps to do so?
Or if anybody have a better idea on developing SharePoint mobile app not using xamarin?
To dev your mobile App, you need to use REST API of SharePoint or you can use the CSOM (Client SharePoint Object Model).
have a look at this link witch explain how to do that with rest api : Build mobile apps for other platforms using SharePoint 2013