private void OnAddRecord(TrackedDayRecordViewModel recordViewModel)
{
TrackerService.AddRecordToday(Mapper.Map <TrackedDayRecordModel>(recordViewModel));
// add to view model
var user = (UserViewModel)BindingContext;
var trackedToday = user.TrackedToday();
trackedToday.Records.Add(recordViewModel);
BindingContext = Mapper.Map <UserViewModel>(App.User);
}