AngularJS $scope values from ng-model lost from page to page in same controller - Ionic Framework

I have this page which links the input.countNum scope variable to the input with ng-model. The value which is displayed on the button shows fine. When you click the button on the first page, it navigates to the second page which also displays the scope variable. But the variable is reset to the default declaration value in the controller code.

How do I maintain the scope value from ng-model between pages within the same controller?

tab-dash.html

<ion-view view-title="Test">

  <ion-content class="padding">

    <div class="list">

        <label class="item item-input">
            <span class="input-label">Count</span>
            <input class="text-right" type="number" pattern="[0-9]*" ng-model="input.countNum">
        </label>

    </div>

    <button class="button button-full button-positive" ng-click="create()" ui-sref="tab.count">
        Count is ({{input.countNum}})
    </button>

  </ion-content>
</ion-view>

controller.js

.controller('DashCtrl', function($scope) {

    $scope.input = {
        countNum: 1
    };

    $scope.create = function() {
        // Logic here
    };


})

count.html

<ion-view view-title="Count">

    <ion-nav-bar class="bar-energized">
        <ion-nav-back-button class="button-clear">
            <i class="ion-arrow-left-c"></i> Back
        </ion-nav-back-button>
    </ion-nav-bar>

  <ion-content class="padding">

    <button class="button button-full button-positive">
        ({{input.countNum}})
    </button>

  </ion-content>
</ion-view>

app.js

  .state('tab', {
    url: "/tab",
    abstract: true,
    templateUrl: "templates/tabs.html"
  })

  // Each tab has its own nav history stack:

  .state('tab.dash', {
    url: '/dash',
    views: {
      'tab-dash': {
        templateUrl: 'templates/tab-dash.html',
        controller: 'DashCtrl'
      }
    }
  })

  .state('tab.count', {
    url: '/count',
    views: {
      'tab-dash': {
        templateUrl: 'templates/count.html',
        controller: 'DashCtrl'
      }
    }
  })