diff --git a/.gitignore b/.gitignore
index fdb60427..93784e2d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -164,3 +164,31 @@ screenshots/
 CampusAppWP8/packages/WPtoolkit.4.2012.10.30/lib/sl3-wp/Microsoft.Phone.Controls.Toolkit.dll
 CampusAppWP8/packages/WPtoolkit.4.2012.10.30/lib/sl4-windowsphone71/Microsoft.Phone.Controls.Toolkit.dll
 CampusAppWP8/packages/WPtoolkit.4.2012.10.30/lib/wp8/Microsoft.Phone.Controls.Toolkit.dll
+CampusAppWP8/packages/BuiltToRoam.Core.Agent.1.0.1.5/BuiltToRoam.Core.Agent.1.0.1.5.nupkg
+CampusAppWP8/packages/BuiltToRoam.Core.Agent.1.0.1.5/BuiltToRoam.Core.Agent.1.0.1.5.nuspec
+CampusAppWP8/packages/BuiltToRoam.Core.Agent.1.0.1.5/lib/sl4-wp71/AsyncCtpLibrary_Phone.dll
+CampusAppWP8/packages/BuiltToRoam.Core.Agent.1.0.1.5/lib/sl4-wp71/BuiltToRoam.Core.Agent.dll
+CampusAppWP8/packages/BuiltToRoam.GeoWatcher.1.0.1.5/BuiltToRoam.GeoWatcher.1.0.1.5.nupkg
+CampusAppWP8/packages/BuiltToRoam.GeoWatcher.1.0.1.5/BuiltToRoam.GeoWatcher.1.0.1.5.nuspec
+CampusAppWP8/packages/BuiltToRoam.GeoWatcher.1.0.1.5/lib/sl4-wp71/BuiltToRoam.GeoWatcher.dll
+CampusAppWP8/packages/Newtonsoft.Json.4.5.11/Newtonsoft.Json.4.5.11.nupkg
+CampusAppWP8/packages/Newtonsoft.Json.4.5.11/Newtonsoft.Json.4.5.11.nuspec
+CampusAppWP8/packages/Newtonsoft.Json.4.5.11/lib/net20/Newtonsoft.Json.dll
+CampusAppWP8/packages/Newtonsoft.Json.4.5.11/lib/net20/Newtonsoft.Json.xml
+CampusAppWP8/packages/Newtonsoft.Json.4.5.11/lib/net35/Newtonsoft.Json.dll
+CampusAppWP8/packages/Newtonsoft.Json.4.5.11/lib/net35/Newtonsoft.Json.xml
+CampusAppWP8/packages/Newtonsoft.Json.4.5.11/lib/net40/Newtonsoft.Json.dll
+CampusAppWP8/packages/Newtonsoft.Json.4.5.11/lib/net40/Newtonsoft.Json.xml
+CampusAppWP8/packages/Newtonsoft.Json.4.5.11/lib/portable-net40+sl4+wp7+win8/Newtonsoft.Json.dll
+CampusAppWP8/packages/Newtonsoft.Json.4.5.11/lib/portable-net40+sl4+wp7+win8/Newtonsoft.Json.xml
+CampusAppWP8/packages/Newtonsoft.Json.4.5.11/lib/sl3-wp/Newtonsoft.Json.dll
+CampusAppWP8/packages/Newtonsoft.Json.4.5.11/lib/sl3-wp/Newtonsoft.Json.xml
+CampusAppWP8/packages/Newtonsoft.Json.4.5.11/lib/sl4-windowsphone71/Newtonsoft.Json.dll
+CampusAppWP8/packages/Newtonsoft.Json.4.5.11/lib/sl4-windowsphone71/Newtonsoft.Json.xml
+CampusAppWP8/packages/Newtonsoft.Json.4.5.11/lib/sl4/Newtonsoft.Json.dll
+CampusAppWP8/packages/Newtonsoft.Json.4.5.11/lib/sl4/Newtonsoft.Json.xml
+CampusAppWP8/packages/Newtonsoft.Json.4.5.11/lib/winrt45/Newtonsoft.Json.dll
+CampusAppWP8/packages/Newtonsoft.Json.4.5.11/lib/winrt45/Newtonsoft.Json.xml
+CampusAppWP8/packages/SharpZipLib-WP7.0.86.0.518/SharpZipLib-WP7.0.86.0.518.nupkg
+CampusAppWP8/packages/SharpZipLib-WP7.0.86.0.518/SharpZipLib-WP7.0.86.0.518.nuspec
+CampusAppWP8/packages/SharpZipLib-WP7.0.86.0.518/lib/sl4-windowsphone71/SharpZipLib.WindowsPhone7.dll
diff --git a/CampusAppWP8/CampusAppWP8/Api/GeoApi/SpsApi.cs b/CampusAppWP8/CampusAppWP8/Api/GeoApi/SpsApi.cs
new file mode 100644
index 00000000..3dcff447
--- /dev/null
+++ b/CampusAppWP8/CampusAppWP8/Api/GeoApi/SpsApi.cs
@@ -0,0 +1,27 @@
+//-----------------------------------------------------------------------
+// <copyright file="SpsApi.cs" company="BTU/IIT">
+//     Company copyright tag.
+// </copyright>
+// <author>stubbfel</author>
+// <sience>06.08.2013</sience>
+//----------------------------------------------------------------------
+namespace CampusAppWP8.Feed.GeoApi
+{
+    using CampusAppWP8.Model;
+    using CampusAppWP8.Model.GeoDb;
+    using CampusAppWP8.Resources;
+
+    /// <summary>
+    /// Class for SPSAPI
+    /// </summary>
+    public class SpsApi : XmlModel<SpsModel>
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="SpsApi" /> class.
+        /// </summary>
+        public SpsApi()
+            : base(ModelType.Feed, Constants.UrlSpsService)
+        {
+        }
+    }
+}
diff --git a/CampusAppWP8/CampusAppWP8/App.xaml.cs b/CampusAppWP8/CampusAppWP8/App.xaml.cs
index 9d7a8955..46d1bfa0 100644
--- a/CampusAppWP8/CampusAppWP8/App.xaml.cs
+++ b/CampusAppWP8/CampusAppWP8/App.xaml.cs
@@ -1,15 +1,18 @@
-using System;
+using CampusAppWP8.File.Setting;
+using CampusAppWP8.Model.Setting;
+using CampusAppWP8.Resources;
+using CampusAppWP8.Utility;
+using Microsoft.Phone.Controls;
+using Microsoft.Phone.Shell;
+using System;
 using System.Diagnostics;
-using System.Resources;
+using System.Globalization;
+using System.IO.IsolatedStorage;
+using System.Threading;
 using System.Windows;
 using System.Windows.Markup;
 using System.Windows.Navigation;
-using Microsoft.Phone.Controls;
-using Microsoft.Phone.Shell;
-using CampusAppWP8.Resources;
-using System.IO.IsolatedStorage;
-using CampusAppWP8.File.Setting;
-using CampusAppWP8.Model.Setting;
+using Windows.Devices.Geolocation;
 
 
 namespace CampusAppWP8
@@ -127,6 +130,7 @@ namespace CampusAppWP8
             }
             return default(T);
         }
+
         // Code, der beim Starten der Anwendung ausgeführt werden soll (z. B. über "Start")
         // Dieser Code wird beim Reaktivieren der Anwendung nicht ausgeführt
         private void Application_Launching(object sender, LaunchingEventArgs e)
@@ -134,6 +138,9 @@ namespace CampusAppWP8
             this.LoadSettings();
         }
 
+        /// <summary>
+        /// Load the appsettings from the store
+        /// </summary>
         private void LoadSettings()
         {
             UserProfilFile userFile;
@@ -147,7 +154,14 @@ namespace CampusAppWP8
             {
                 this.UserSettingsLoaded();
             }
+
+            Thread thread = new Thread(new ThreadStart(Utilities.DetermineAndStoreCurrentPosition));
+            thread.Start();
         }
+
+        /// <summary>
+        /// Load the usersettings from the store
+        /// </summary>
         private void UserSettingsLoaded()
         {
             if (Settings.UserProfil.Model == null)
@@ -161,6 +175,7 @@ namespace CampusAppWP8
         private void Application_Activated(object sender, ActivatedEventArgs e)
         {
             this.LoadSettings();
+           
         }
 
         // Code, der ausgeführt werden soll, wenn die Anwendung deaktiviert wird (in den Hintergrund gebracht wird)
diff --git a/CampusAppWP8/CampusAppWP8/CampusAppWP8.csproj b/CampusAppWP8/CampusAppWP8/CampusAppWP8.csproj
index cc5f5a59..bc1fd99d 100644
--- a/CampusAppWP8/CampusAppWP8/CampusAppWP8.csproj
+++ b/CampusAppWP8/CampusAppWP8/CampusAppWP8.csproj
@@ -93,16 +93,21 @@
     <WarningLevel>4</WarningLevel>
   </PropertyGroup>
   <ItemGroup>
+    <Compile Include="Api\GeoApi\SpsApi.cs" />
     <Compile Include="App.xaml.cs">
       <DependentUpon>App.xaml</DependentUpon>
     </Compile>
     <Compile Include="Feed\Departments\DepartmentFavoriteFeed.cs" />
     <Compile Include="Const.cs" />
     <Compile Include="File\Setting\UserProfilFile.cs" />
+    <Compile Include="Model\GeoDb\PlaceModel.cs" />
+    <Compile Include="Model\GeoDb\SpsModel.cs" />
     <Compile Include="Model\Mensa\MealModel.cs" />
+    <Compile Include="Model\Setting\AppSettings.cs" />
     <Compile Include="Model\Setting\UserProfilModel.cs" />
     <Compile Include="Model\Utility\CourseListPickerItemListModel.cs" />
     <Compile Include="Model\Utility\DegreeListPickerItemListModel.cs" />
+    <Compile Include="Model\Utility\CleanUrlParamModel.cs" />
     <Compile Include="Model\Utility\RoleListPickerItemListModel.cs" />
     <Compile Include="Model\Utility\SemesterListPickerItemListModel.cs" />
     <Compile Include="Model\Utility\ListPickerItemListModel.cs" />
@@ -420,10 +425,25 @@
     </EmbeddedResource>
   </ItemGroup>
   <ItemGroup>
+    <Reference Include="AsyncCtpLibrary_Phone">
+      <HintPath>..\packages\BuiltToRoam.Core.Agent.1.0.1.5\lib\sl4-wp71\AsyncCtpLibrary_Phone.dll</HintPath>
+    </Reference>
+    <Reference Include="BuiltToRoam.Core.Agent">
+      <HintPath>..\packages\BuiltToRoam.Core.Agent.1.0.1.5\lib\sl4-wp71\BuiltToRoam.Core.Agent.dll</HintPath>
+    </Reference>
+    <Reference Include="BuiltToRoam.GeoWatcher">
+      <HintPath>..\packages\BuiltToRoam.GeoWatcher.1.0.1.5\lib\sl4-wp71\BuiltToRoam.GeoWatcher.dll</HintPath>
+    </Reference>
     <Reference Include="Microsoft.Phone.Controls, Version=8.0.0.0, Culture=neutral, PublicKeyToken=24eec0d8c86cda1e, processorArchitecture=MSIL" />
     <Reference Include="Microsoft.Phone.Controls.Toolkit">
       <HintPath>..\packages\WPtoolkit.4.2012.10.30\lib\wp8\Microsoft.Phone.Controls.Toolkit.dll</HintPath>
     </Reference>
+    <Reference Include="Newtonsoft.Json">
+      <HintPath>..\packages\Newtonsoft.Json.4.5.11\lib\sl4-windowsphone71\Newtonsoft.Json.dll</HintPath>
+    </Reference>
+    <Reference Include="SharpZipLib.WindowsPhone7">
+      <HintPath>..\packages\SharpZipLib-WP7.0.86.0.518\lib\sl4-windowsphone71\SharpZipLib.WindowsPhone7.dll</HintPath>
+    </Reference>
   </ItemGroup>
   <ItemGroup />
   <Import Project="$(MSBuildExtensionsPath)\Microsoft\$(TargetFrameworkIdentifier)\$(TargetFrameworkVersion)\Microsoft.$(TargetFrameworkIdentifier).$(TargetFrameworkVersion).Overrides.targets" />
diff --git a/CampusAppWP8/CampusAppWP8/Model/GeoDb/PlaceModel.cs b/CampusAppWP8/CampusAppWP8/Model/GeoDb/PlaceModel.cs
new file mode 100644
index 00000000..68acbbbe
--- /dev/null
+++ b/CampusAppWP8/CampusAppWP8/Model/GeoDb/PlaceModel.cs
@@ -0,0 +1,36 @@
+//-----------------------------------------------------------------------
+// <copyright file="PlaceModel.cs" company="BTU/IIT">
+//     Company copyright tag.
+// </copyright>
+// <author>stubbfel</author>
+// <sience>08.08.2013</sience>
+//----------------------------------------------------------------------
+
+namespace CampusAppWP8.Model.GeoDb
+{
+    using System.Xml.Serialization;
+
+    /// <summary>
+    /// Model for a place of the SPSService
+    /// </summary>
+    public class PlaceModel
+    {
+        /// <summary>
+        /// Gets or sets the placeId
+        /// </summary>
+        [XmlAttribute("id")]
+        public string PlaceId { get; set; }
+
+        /// <summary>
+        /// Gets or sets the id of the "parent" of a place
+        /// </summary>
+        [XmlAttribute("parentId")]
+        public string ParentId { get; set; }
+
+        /// <summary>
+        /// Gets or sets the ReferencePoint of a place
+        /// </summary>
+        [XmlAttribute("refpoint")]
+        public string RefPoint { get; set; }
+    }
+}
diff --git a/CampusAppWP8/CampusAppWP8/Model/GeoDb/SpsModel.cs b/CampusAppWP8/CampusAppWP8/Model/GeoDb/SpsModel.cs
new file mode 100644
index 00000000..0b4fea86
--- /dev/null
+++ b/CampusAppWP8/CampusAppWP8/Model/GeoDb/SpsModel.cs
@@ -0,0 +1,26 @@
+//-----------------------------------------------------------------------
+// <copyright file="SpsModel.cs" company="BTU/IIT">
+//     Company copyright tag.
+// </copyright>
+// <author>stubbfel</author>
+// <sience>08.08.2013</sience>
+//----------------------------------------------------------------------
+
+namespace CampusAppWP8.Model.GeoDb
+{
+    using System.Collections.ObjectModel;
+    using System.Xml.Serialization;
+
+    /// <summary>
+    /// Model for a xml-response of the SPSService
+    /// </summary>
+    [XmlRoot("root")]
+    public class SpsModel
+    {
+        /// <summary>
+        /// Gets or sets a list of places
+        /// </summary>
+        [XmlElement("place")]
+        public ObservableCollection<PlaceModel> Places { get; set; }
+    }
+}
diff --git a/CampusAppWP8/CampusAppWP8/Model/Mensa/MenuWeekModel.cs b/CampusAppWP8/CampusAppWP8/Model/Mensa/MenuWeekModel.cs
index 1451075b..11cedc69 100644
--- a/CampusAppWP8/CampusAppWP8/Model/Mensa/MenuWeekModel.cs
+++ b/CampusAppWP8/CampusAppWP8/Model/Mensa/MenuWeekModel.cs
@@ -24,8 +24,8 @@ namespace CampusAppWP8.Model.Mensa
         private readonly DateTime createTime;
 
         #endregion
-        
-         #region Constructor
+
+        #region Constructor
 
         /// <summary>
         /// Initializes a new instance of the <see cref="MenuWeekModel" /> class.
@@ -49,16 +49,16 @@ namespace CampusAppWP8.Model.Mensa
         /// <summary>
         /// Gets the creation time of the model
         /// </summary>
-        public DateTime CreateTime 
-        { 
-            get 
-            { 
+        public DateTime CreateTime
+        {
+            get
+            {
                 return this.createTime;
-            } 
+            }
         }
 
         #endregion
-        
+
         #region Methods
 
         /// <summary>
diff --git a/CampusAppWP8/CampusAppWP8/Model/Setting/AppSettings.cs b/CampusAppWP8/CampusAppWP8/Model/Setting/AppSettings.cs
new file mode 100644
index 00000000..aadf0ad0
--- /dev/null
+++ b/CampusAppWP8/CampusAppWP8/Model/Setting/AppSettings.cs
@@ -0,0 +1,50 @@
+//-----------------------------------------------------------------------
+// <copyright file="AppSettings.cs" company="BTU/IIT">
+//     Company copyright tag.
+// </copyright>
+// <author>stubbfel</author>
+// <sience>08.08.2013</sience>
+//----------------------------------------------------------------------
+
+namespace CampusAppWP8.Model.Setting
+{
+    using CampusAppWP8.Resources;
+
+    /// <summary>
+    /// Model for settings of the app
+    /// </summary>
+    public class AppSettings
+    {
+        /// <summary>
+        /// Gets or sets a value indicating whether the GeoWatch-Flag
+        /// </summary>
+        public bool GeoWatchEnable
+        {
+            get
+            {
+                return App.LoadFromAppState<bool>(Constants.AppSetting_GeoWatchEnable);
+            }
+
+            set
+            {
+                App.SaveToAppState<bool>(Constants.AppSetting_GeoWatchEnable, value);
+            }
+        }
+
+        /// <summary>
+        /// Gets or sets a value indicating whether the InitializationApp-Flag
+        /// </summary>
+        public bool InitApp
+        {
+            get
+            {
+                return App.LoadFromAppState<bool>(Constants.AppSetting_GeoWatchEnable);
+            }
+
+            set
+            {
+                App.SaveToAppState<bool>(Constants.AppSetting_GeoWatchEnable, value);
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/CampusAppWP8/CampusAppWP8/Model/Utility/CleanUrlParamModel.cs b/CampusAppWP8/CampusAppWP8/Model/Utility/CleanUrlParamModel.cs
new file mode 100644
index 00000000..46d2211c
--- /dev/null
+++ b/CampusAppWP8/CampusAppWP8/Model/Utility/CleanUrlParamModel.cs
@@ -0,0 +1,67 @@
+//-----------------------------------------------------------------------
+// <copyright file="CleanUrlParamModel.cs" company="BTU/IIT">
+//     Company copyright tag.
+// </copyright>
+// <author>stubbfel</author>
+// <sience>06.08.2013</sience>
+//----------------------------------------------------------------------
+namespace CampusAppWP8.Model.Utility
+{
+    /// <summary>
+    /// This class is a Model for the URLParameter like GET-Parameter
+    /// </summary>
+    public class CleanUrlParamModel:UrlParamModel
+    {
+        #region Constructor
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="UrlParamModel" /> class.
+        /// </summary>
+        /// <param name="key">the key for the parameter</param>
+        public CleanUrlParamModel(string key) :base(key)
+        {
+
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="UrlParamModel" /> class.
+        /// </summary>
+        /// <param name="key">the key for the parameter</param>>
+        /// <param name="value">value of the parameter</param>
+        public CleanUrlParamModel(string key, string value) : base(key,value)
+        {
+        }
+        #endregion
+
+        #region Proberty
+
+        /// <summary>
+        /// Gets the token, which indicate that the parameterList started
+        /// </summary>
+        public override string ParamToken
+        {
+            get
+            {
+                return string.Empty;
+            }
+        }
+        #endregion
+
+        #region Methods
+
+        /// <summary>
+        /// Method return a formatted string like Key=Value
+        /// </summary>
+        /// <returns> return formatted string</returns>
+        public override string ToString()
+        {
+            if (!this.IsParamValid())
+            {
+                return string.Empty;
+            }
+
+            return "/" + this.key + "/" + this.Value;
+        }
+        #endregion
+    }
+}
diff --git a/CampusAppWP8/CampusAppWP8/Model/Utility/URLParamModel.cs b/CampusAppWP8/CampusAppWP8/Model/Utility/URLParamModel.cs
index a439e875..8f3a6b47 100644
--- a/CampusAppWP8/CampusAppWP8/Model/Utility/URLParamModel.cs
+++ b/CampusAppWP8/CampusAppWP8/Model/Utility/URLParamModel.cs
@@ -17,7 +17,7 @@ namespace CampusAppWP8.Model.Utility
         /// <summary>
         /// Variable of the key
         /// </summary>
-        private readonly string key;
+        protected readonly string key;
 
         #endregion
 
@@ -65,7 +65,7 @@ namespace CampusAppWP8.Model.Utility
         /// <summary>
         /// Gets the token, which indicate that the parameterList started
         /// </summary>
-        public string ParamToken
+        public virtual string ParamToken
         {
             get
             {
diff --git a/CampusAppWP8/CampusAppWP8/Pages/Mensa/MensaPage.xaml.cs b/CampusAppWP8/CampusAppWP8/Pages/Mensa/MensaPage.xaml.cs
index 46d5f76d..f415ccc9 100644
--- a/CampusAppWP8/CampusAppWP8/Pages/Mensa/MensaPage.xaml.cs
+++ b/CampusAppWP8/CampusAppWP8/Pages/Mensa/MensaPage.xaml.cs
@@ -24,6 +24,8 @@ namespace CampusAppWP8.Pages.Mensa
         /// </summary>
         private MensaFeed feed;
 
+        // private SpsApi spsApi;
+
         /// <summary>
         /// Index representing the weekday of today
         /// 0 - Monday(Default)
@@ -72,8 +74,32 @@ namespace CampusAppWP8.Pages.Mensa
 
             this.ProgressBar.Visibility = System.Windows.Visibility.Visible;
             this.feed.LoadData();
+
+            // this.determinCurrentPosition();
         }
 
+/* need for later feature (#147)
+        private void determinCurrentPosition()
+        {
+            Utilities.DetermineAndStoreCurrentPosition();
+            string lat = App.LoadFromAppState<string>("CurrentPosition.Lat");
+            string log = App.LoadFromAppState<string>("CurrentPosition.Long");
+
+            this.spsApi = new SpsApi();
+            this.spsApi.onLoaded += new SpsApi.OnLoaded(this.ApiIsReady);
+            List<UrlParamModel> parameterList = new List<UrlParamModel>();
+            parameterList.Add(new CleanUrlParamModel("latitude", lat));
+            parameterList.Add(new CleanUrlParamModel("longitude", log));
+            parameterList.Add(new CleanUrlParamModel("domain", "3"));
+            this.spsApi.SetUriParams(parameterList);
+            this.spsApi.LoadData();
+        }
+
+        private void ApiIsReady()
+        {
+            string i = this.spsApi.Model.Places[0].PlaceId;
+        }*/
+
         /// <summary>
         /// Override the OnNavigatedFrom method
         /// </summary>
diff --git a/CampusAppWP8/CampusAppWP8/Pages/StartPage.xaml.cs b/CampusAppWP8/CampusAppWP8/Pages/StartPage.xaml.cs
index c6f84e3c..9835260f 100644
--- a/CampusAppWP8/CampusAppWP8/Pages/StartPage.xaml.cs
+++ b/CampusAppWP8/CampusAppWP8/Pages/StartPage.xaml.cs
@@ -12,6 +12,7 @@ namespace CampusAppWP8.Pages
     using System.Windows.Controls;
     using System.Windows.Navigation;
     using CampusAppWP8.Resources;
+    using CampusAppWP8.Utility;
     using Microsoft.Phone.Controls;
     using Microsoft.Phone.Shell;
 
@@ -31,6 +32,12 @@ namespace CampusAppWP8.Pages
             {
                 menuItem1.Text = AppResources.Setting_UserProfilAppBarTitle;
             }
+
+            if (Settings.AppSetting.InitApp)
+            {
+                this.ShowOptIns();
+                Settings.AppSetting.InitApp = true;
+            }
         }
 
         /// <summary>
@@ -57,8 +64,8 @@ namespace CampusAppWP8.Pages
 
                 HomeworkAppButtonText.Text = AppResources.HomeworkApp_Title;
                 ContentPanel.RowDefinitions[3].Height = GridLength.Auto;
-                ContentPanel.ColumnDefinitions[3].Width = new GridLength(1, GridUnitType.Star); 
-            }           
+                ContentPanel.ColumnDefinitions[3].Width = new GridLength(1, GridUnitType.Star);
+            }
             else
             {
                 // If not in portrait, move buttonList content to visible row and column.
@@ -75,17 +82,27 @@ namespace CampusAppWP8.Pages
 
                 HomeworkAppButtonText.Text = AppResources.HomeworkApp_Title2;
 
-                ContentPanel.RowDefinitions[3].Height = new GridLength(1,GridUnitType.Star);
+                ContentPanel.RowDefinitions[3].Height = new GridLength(1, GridUnitType.Star);
                 ContentPanel.ColumnDefinitions[3].Width = GridLength.Auto;
             }
         }
 
+        /// <summary>
+        /// Method Navigate to <see cref="Setting/UserProfil"/>
+        /// </summary>
+        /// <param name="sender">Caller of the function</param>
+        /// <param name="e">some EventArgs</param>
         private void ApplicationBarMenuItem_Click(object sender, EventArgs e)
         {
             Uri url = new Uri(Constants.PathSetting_User, UriKind.Relative);
             NavigationService.Navigate(url);
         }
 
+        /// <summary>
+        /// Method change the Opacity of the ApplicationBar
+        /// </summary>
+        /// <param name="sender">Caller of the function</param>
+        /// <param name="e">some EventArgs</param>
         private void ApplicationBar_StateChanged(object sender, ApplicationBarStateChangedEventArgs e)
         {
             if (e.IsMenuVisible)
@@ -97,5 +114,31 @@ namespace CampusAppWP8.Pages
                 ApplicationBar.Opacity = 0.5;
             }
         }
+
+        /// <summary>
+        /// Method show all OptIns
+        /// </summary>
+        private void ShowOptIns()
+        {
+            this.GeoWatchOptIN();
+        }
+
+        /// <summary>
+        /// Method show the GeoWatchOptIn in a MessageBox
+        /// </summary>
+        private void GeoWatchOptIN()
+        {
+            MessageBoxResult result = MessageBox.Show(AppResources.GeoWatch_OptInText, AppResources.GeoWatch_OptInHeader, MessageBoxButton.OKCancel);
+
+            if (result == MessageBoxResult.OK)
+            {
+                Settings.AppSetting.GeoWatchEnable = true;
+                Utilities.DetermineAndStoreCurrentPosition();
+            }
+            else
+            {
+                Settings.AppSetting.GeoWatchEnable = false;
+            }
+        }
     }
 }
\ No newline at end of file
diff --git a/CampusAppWP8/CampusAppWP8/Resources/AppResources.Designer.cs b/CampusAppWP8/CampusAppWP8/Resources/AppResources.Designer.cs
index e9372b2d..b2d6dccd 100644
--- a/CampusAppWP8/CampusAppWP8/Resources/AppResources.Designer.cs
+++ b/CampusAppWP8/CampusAppWP8/Resources/AppResources.Designer.cs
@@ -204,6 +204,24 @@ namespace CampusAppWP8.Resources {
             }
         }
         
+        /// <summary>
+        ///   Sucht eine lokalisierte Zeichenfolge, die Ortung ähnelt.
+        /// </summary>
+        public static string GeoWatch_OptInHeader {
+            get {
+                return ResourceManager.GetString("GeoWatch_OptInHeader", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Sucht eine lokalisierte Zeichenfolge, die Dürfen Positionsdaten enhober und verwendet werdet? ähnelt.
+        /// </summary>
+        public static string GeoWatch_OptInText {
+            get {
+                return ResourceManager.GetString("GeoWatch_OptInText", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Sucht eine lokalisierte Zeichenfolge, die Hinweis ähnelt.
         /// </summary>
diff --git a/CampusAppWP8/CampusAppWP8/Resources/AppResources.resx b/CampusAppWP8/CampusAppWP8/Resources/AppResources.resx
index af5596e0..4677210c 100644
--- a/CampusAppWP8/CampusAppWP8/Resources/AppResources.resx
+++ b/CampusAppWP8/CampusAppWP8/Resources/AppResources.resx
@@ -359,4 +359,10 @@
   <data name="MensaApp_Soup" xml:space="preserve">
     <value>Suppe</value>
   </data>
+  <data name="GeoWatch_OptInHeader" xml:space="preserve">
+    <value>Ortung</value>
+  </data>
+  <data name="GeoWatch_OptInText" xml:space="preserve">
+    <value>Dürfen Positionsdaten enhober und verwendet werdet?</value>
+  </data>
 </root>
\ No newline at end of file
diff --git a/CampusAppWP8/CampusAppWP8/Resources/Constants.Designer.cs b/CampusAppWP8/CampusAppWP8/Resources/Constants.Designer.cs
index 1b6ef17d..950c81cb 100644
--- a/CampusAppWP8/CampusAppWP8/Resources/Constants.Designer.cs
+++ b/CampusAppWP8/CampusAppWP8/Resources/Constants.Designer.cs
@@ -60,6 +60,24 @@ namespace CampusAppWP8.Resources {
             }
         }
         
+        /// <summary>
+        ///   Sucht eine lokalisierte Zeichenfolge, die AppSetting.GeoWatchEnable ähnelt.
+        /// </summary>
+        public static string AppSetting_GeoWatchEnable {
+            get {
+                return ResourceManager.GetString("AppSetting_GeoWatchEnable", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Sucht eine lokalisierte Zeichenfolge, die AppSetting.InitApp ähnelt.
+        /// </summary>
+        public static string AppSetting_InitApp {
+            get {
+                return ResourceManager.GetString("AppSetting_InitApp", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Sucht eine lokalisierte Zeichenfolge, die DepartmentFavoriteFeed.xml ähnelt.
         /// </summary>
@@ -150,6 +168,33 @@ namespace CampusAppWP8.Resources {
             }
         }
         
+        /// <summary>
+        ///   Sucht eine lokalisierte Zeichenfolge, die CurrentPosition.Lat ähnelt.
+        /// </summary>
+        public static string GeoWatch_CurrentPosition_Lat {
+            get {
+                return ResourceManager.GetString("GeoWatch_CurrentPosition_Lat", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Sucht eine lokalisierte Zeichenfolge, die CurrentPosition.Long ähnelt.
+        /// </summary>
+        public static string GeoWatch_CurrentPosition_Long {
+            get {
+                return ResourceManager.GetString("GeoWatch_CurrentPosition_Long", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Sucht eine lokalisierte Zeichenfolge, die CurrentPosition.Time ähnelt.
+        /// </summary>
+        public static string GeoWatch_CurrentPosition_Time {
+            get {
+                return ResourceManager.GetString("GeoWatch_CurrentPosition_Time", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Sucht eine lokalisierte Zeichenfolge, die IsolatedStorage_DepartmentFavoriteModel ähnelt.
         /// </summary>
@@ -654,6 +699,15 @@ namespace CampusAppWP8.Resources {
             }
         }
         
+        /// <summary>
+        ///   Sucht eine lokalisierte Zeichenfolge, die http://141.43.76.140/service/sps ähnelt.
+        /// </summary>
+        public static string UrlSpsService {
+            get {
+                return ResourceManager.GetString("UrlSpsService", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Sucht eine lokalisierte Zeichenfolge, die http://www.tu-cottbus.de/campusapp-data/getdata.php?db=studentcouncils&amp;app=2&amp;appversion=1 ähnelt.
         /// </summary>
diff --git a/CampusAppWP8/CampusAppWP8/Resources/Constants.resx b/CampusAppWP8/CampusAppWP8/Resources/Constants.resx
index 8520e922..99e8808a 100644
--- a/CampusAppWP8/CampusAppWP8/Resources/Constants.resx
+++ b/CampusAppWP8/CampusAppWP8/Resources/Constants.resx
@@ -333,4 +333,22 @@
   <data name="MealIconName_Wild" xml:space="preserve">
     <value>WILD</value>
   </data>
+  <data name="AppSetting_GeoWatchEnable" xml:space="preserve">
+    <value>AppSetting.GeoWatchEnable</value>
+  </data>
+  <data name="AppSetting_InitApp" xml:space="preserve">
+    <value>AppSetting.InitApp</value>
+  </data>
+  <data name="GeoWatch_CurrentPosition_Lat" xml:space="preserve">
+    <value>CurrentPosition.Lat</value>
+  </data>
+  <data name="GeoWatch_CurrentPosition_Long" xml:space="preserve">
+    <value>CurrentPosition.Long</value>
+  </data>
+  <data name="GeoWatch_CurrentPosition_Time" xml:space="preserve">
+    <value>CurrentPosition.Time</value>
+  </data>
+  <data name="UrlSpsService" xml:space="preserve">
+    <value>http://141.43.76.140/service/sps</value>
+  </data>
 </root>
\ No newline at end of file
diff --git a/CampusAppWP8/CampusAppWP8/Settings.cs b/CampusAppWP8/CampusAppWP8/Settings.cs
index efb0f5b6..3e22f380 100644
--- a/CampusAppWP8/CampusAppWP8/Settings.cs
+++ b/CampusAppWP8/CampusAppWP8/Settings.cs
@@ -9,6 +9,7 @@
 namespace CampusAppWP8
 {
     using CampusAppWP8.File.Setting;
+    using CampusAppWP8.Model.Setting;
 
     /// <summary>
     /// Class handle all setting (files)
@@ -20,6 +21,11 @@ namespace CampusAppWP8
         /// </summary>
         private static UserProfilFile userProfil = new UserProfilFile();
 
+        /// <summary>
+        /// reference of the appSettings
+        /// </summary>
+        private static AppSettings appSetting = new AppSettings();
+
         /// <summary>
         /// Gets or sets the user-profile-file
         /// </summary>
@@ -38,5 +44,24 @@ namespace CampusAppWP8
                 }
             }
         }
+
+        /// <summary>
+        /// Gets or sets the AppSetting
+        /// </summary>
+        public static AppSettings AppSetting
+        {
+            get
+            {
+                return Settings.appSetting;
+            }
+
+            set
+            {
+                if (value != Settings.appSetting)
+                {
+                    Settings.appSetting = value;
+                }
+            }
+        }
     }
 }
diff --git a/CampusAppWP8/CampusAppWP8/Utility/Utilities.cs b/CampusAppWP8/CampusAppWP8/Utility/Utilities.cs
index 243929ed..70fe8fdd 100644
--- a/CampusAppWP8/CampusAppWP8/Utility/Utilities.cs
+++ b/CampusAppWP8/CampusAppWP8/Utility/Utilities.cs
@@ -9,10 +9,13 @@ namespace CampusAppWP8.Utility
 {
     using System;
     using System.Collections.Generic;
+    using System.Device.Location;
+    using System.Globalization;
     using System.Linq;
     using System.Windows;
     using System.Windows.Controls;
     using System.Windows.Media;
+    using CampusAppWP8.Resources;
 
     /// <summary>
     /// Collection of utility functions.
@@ -191,5 +194,74 @@ namespace CampusAppWP8.Utility
 
             return retValue;
         }
+
+        /// <summary>
+        /// Method determine the current position of the phone
+        /// </summary>
+        /// <param name="accuracy">accuracy of the position in meters</param>
+        /// <returns>the position of the phone</returns>
+        public static GeoPosition<GeoCoordinate> DetermineCurrentPosition(uint accuracy = 50)
+        {
+            if (!Settings.AppSetting.GeoWatchEnable)
+            {
+                return null;
+            }
+
+            GeoCoordinateWatcher watcher = new GeoCoordinateWatcher(GeoPositionAccuracy.High);
+            bool success = watcher.TryStart(false, TimeSpan.FromMilliseconds(1000));
+            GeoPosition<GeoCoordinate> geoposition = null;
+            if (success)
+            {
+                geoposition = watcher.Position;
+            }
+
+            watcher.Stop();
+            return geoposition;
+        }
+
+        /// <summary>
+        /// Method determine and store the current position of the phone
+        /// </summary>
+        public static void DetermineAndStoreCurrentPositionForce()
+        {
+            GeoPosition<GeoCoordinate> geoposition = Utilities.DetermineCurrentPosition();
+            if (geoposition != null)
+            {
+                string lat = geoposition.Location.Latitude.ToString(CultureInfo.InvariantCulture);
+                string log = geoposition.Location.Longitude.ToString(CultureInfo.InvariantCulture);
+                string time = geoposition.Timestamp.Ticks.ToString();
+                App.SaveToAppState<string>(Constants.GeoWatch_CurrentPosition_Lat, lat);
+                App.SaveToAppState<string>(Constants.GeoWatch_CurrentPosition_Long, log);
+                App.SaveToAppState<string>(Constants.GeoWatch_CurrentPosition_Time, time);
+            }
+        }
+
+        /// <summary>
+        /// Method determine and store the current position of the phone, in 15 min interval
+        /// </summary>
+        public static void DetermineAndStoreCurrentPosition()
+        {
+            string lat = App.LoadFromAppState<string>(Constants.GeoWatch_CurrentPosition_Lat);
+            string log = App.LoadFromAppState<string>(Constants.GeoWatch_CurrentPosition_Long);
+            string time = App.LoadFromAppState<string>(Constants.GeoWatch_CurrentPosition_Time);
+            if (lat == null || log == null || time == null || lat.Equals(string.Empty) || log.Equals(string.Empty) || time.Equals(string.Empty))
+            {
+                Utilities.DetermineAndStoreCurrentPositionForce();
+            }
+            else
+            {
+                long longTime = 0;
+                if (!long.TryParse(time, out longTime))
+                {
+                    return;
+                }
+
+                DateTime expired = new DateTime(longTime).AddMinutes(15);
+                if (DateTime.Now.Ticks > expired.Ticks)
+                {
+                    Utilities.DetermineAndStoreCurrentPositionForce();
+                }
+            }
+        }
     }
 }
\ No newline at end of file
diff --git a/CampusAppWP8/CampusAppWP8/packages.config b/CampusAppWP8/CampusAppWP8/packages.config
index a6c4d07d..dbbe5283 100644
--- a/CampusAppWP8/CampusAppWP8/packages.config
+++ b/CampusAppWP8/CampusAppWP8/packages.config
@@ -1,4 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
+  <package id="BuiltToRoam.Core.Agent" version="1.0.1.5" targetFramework="wp80" />
+  <package id="BuiltToRoam.GeoWatcher" version="1.0.1.5" targetFramework="wp80" />
+  <package id="Newtonsoft.Json" version="4.5.11" targetFramework="wp80" />
+  <package id="SharpZipLib-WP7" version="0.86.0.518" targetFramework="wp80" />
   <package id="WPtoolkit" version="4.2012.10.30" targetFramework="wp80" />
 </packages>
\ No newline at end of file