Beginner Issue || $rootScope

Hello Guys,

angular.module('starter.services', [])
    .run(function($rootScope) {
        $rootScope.fueherscheinBoolean = false;
        $rootScope.kunden = [];
        $rootScope.id = 0;
    });
angular.module('starter.controllers', [])
    .service("KundenService", function($http, $rootScope) {

        this.loadKundenJson = function() {
            $http.get('data/personen.json').success(function(data) {
                data.forEach(function(obj) {
                    $rootScope.kunden.push(obj);
                    ++$rootScope.id;
                });                
            }).error(function() { console.log("LoadKundenJson Error") });
        }
        this.localStorage = function() {
            var kundenLocalStorage = JSON.parse(localStorage.getItem('kundenLocalStorage'));
            var id = (localStorage.getItem('id'));
            if (kundenLocalStorage && id) {
                $rootScope.id = id;
                $rootScope.kunden = kundenLocalStorage;
                return true;
            }
            return false;
        }
    });
.controller('kundenCtrl', function($scope, $http, $rootScope,KundenService) {
        function initList(){
            if(!KundenService.localStorage()){
                KundenService.loadKundenJson();                
            }
            $scope.kunden = $rootScope.kunden;
            console.log($rootScope.kunden);
            console.log($rootScope.kunden.length);
            console.log($rootScope.id);
        }
        $rootScope.$watch('kunden',function(){
           initList();
        });
    })

console.log($rootScope.kunden):
returns: the right array
image

console.log($rootScope.kunden.length):
returns: 0
console.log($rootScope.id):
returns: 0

If i print the id write after the foreach-loop in the kundenservice service it returns the right value (10)

Could you tell me what im doing wrong? (Ionic v1)
Ty guys!