employee attendance application - based on location

application by the name of just login has been created where to track the employee and based upon GPS , i.e. place of his work he marks his attendance based upon the territory defined from our end on the google maps. in this the employee marks his attendance and also is able to track down his summary report i.e. how many days he had came for work, how many half days he has worked(half days are for late punching into the system and for punching out early form the system), how many days in/she was absent and based upon all this he/she is also able to view the dashboard of his own. We are having this application is ready in ionic framework and is operational in the same. we need to convert the application into xamarin.