diff --git a/Pixiview.iOS/Pixiview.iOS.csproj b/Pixiview.iOS/Pixiview.iOS.csproj
index fc85f28..a15cffe 100644
--- a/Pixiview.iOS/Pixiview.iOS.csproj
+++ b/Pixiview.iOS/Pixiview.iOS.csproj
@@ -70,13 +70,11 @@
     <None Include="Info.plist" />
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="Renderers\AdaptedPageRenderer.cs" />
-    <Compile Include="Services\EnvironmentService.cs" />
     <Compile Include="Renderers\CircleImageRenderer.cs" />
     <Compile Include="Renderers\RoundLabelRenderer.cs" />
     <Compile Include="Renderers\CardViewRenderer.cs" />
     <Compile Include="Renderers\RoundImageRenderer.cs" />
     <Compile Include="GlobalSuppressions.cs" />
-    <Compile Include="Services\FileStore.cs" />
     <Compile Include="Renderers\AppShellRenderer.cs" />
     <Compile Include="Renderers\AppShellSection\AppShellSectionRootHeader.cs" />
     <Compile Include="Renderers\SegmentedControlRenderer.cs" />
@@ -157,7 +155,6 @@
   </ItemGroup>
   <ItemGroup>
     <Folder Include="Renderers\" />
-    <Folder Include="Services\" />
     <Folder Include="Renderers\AppShellSection\" />
     <Folder Include="Effects\" />
     <Folder Include="Assets.xcassets\LauncherLogo.imageset\" />
diff --git a/Pixiview.iOS/Renderers/AdaptedPageRenderer.cs b/Pixiview.iOS/Renderers/AdaptedPageRenderer.cs
index 38ace7b..9c79508 100644
--- a/Pixiview.iOS/Renderers/AdaptedPageRenderer.cs
+++ b/Pixiview.iOS/Renderers/AdaptedPageRenderer.cs
@@ -1,6 +1,5 @@
 using Foundation;
 using Pixiview.iOS.Renderers;
-using Pixiview.iOS.Services;
 using Pixiview.UI;
 using Pixiview.Utils;
 using UIKit;
diff --git a/Pixiview/App.cs b/Pixiview/App.cs
index 3c14f39..47fb48f 100644
--- a/Pixiview/App.cs
+++ b/Pixiview/App.cs
@@ -18,22 +18,9 @@ namespace Pixiview
         // public properties
         public static AppTheme CurrentTheme { get; private set; }
         public static PlatformCulture CurrentCulture { get; private set; }
-        public static Dictionary<string, object> ExtraResources { get; private set; }
 
-        private void InitResources(IEnvironmentService service)
+        private void InitResources()
         {
-            var p = service.GetEnvironment();
-
-            ExtraResources = new Dictionary<string, object>
-            {
-                { ThemeBase.IconLightFontFamily, p.IconLightFontFamily },
-                { ThemeBase.IconRegularFontFamily, p.IconRegularFontFamily },
-                { ThemeBase.IconSolidFontFamily, p.IconSolidFontFamily },
-
-                { ThemeBase.IconLeft, p.IconLeft }
-            };
-
-            //var theme = service.GetApplicationTheme();
             var theme = AppInfo.RequestedTheme;
             SetTheme(theme, true);
         }
@@ -61,10 +48,10 @@ namespace Pixiview
             }
         }
 
-        private void InitLanguage(IEnvironmentService service)
+        private void InitLanguage()
         {
-            var ci = service.GetCurrentCultureInfo();
-            service.SetCultureInfo(ci);
+            var ci = EnvironmentService.GetCurrentCultureInfo();
+            EnvironmentService.SetCultureInfo(ci);
             CurrentCulture = new PlatformCulture(ci.Name.ToLower());
         }
 
@@ -88,19 +75,20 @@ namespace Pixiview
             {
                 themeInstance = LightTheme.Instance;
             }
-            //DependencyService.Get<IEnvironmentService>().SetStatusBarColor
+#if __ANDROID__
+            EnvironmentService.SetStatusBarColor
+#endif
             var style = (StatusBarStyles)themeInstance[ThemeBase.StatusBarStyle];
-            DependencyService.Get<IEnvironmentService>().SetStatusBarStyle(style);
+            EnvironmentService.SetStatusBarStyle(style);
             Resources = themeInstance;
         }
 
         protected override void OnStart()
         {
-            var service = DependencyService.Get<IEnvironmentService>();
-            InitLanguage(service);
+            InitLanguage();
             MainPage = new AppShell();
 
-            InitResources(service);
+            InitResources();
             InitPreferences();
         }
 
@@ -110,7 +98,6 @@ namespace Pixiview
 
         protected override void OnResume()
         {
-            //var theme = DependencyService.Get<IEnvironmentService>().GetApplicationTheme();
             var theme = AppInfo.RequestedTheme;
             SetTheme(theme);
         }
diff --git a/Pixiview/Illust/ViewIllustPage.xaml.cs b/Pixiview/Illust/ViewIllustPage.xaml.cs
index 7cba37a..8cc4095 100644
--- a/Pixiview/Illust/ViewIllustPage.xaml.cs
+++ b/Pixiview/Illust/ViewIllustPage.xaml.cs
@@ -345,8 +345,7 @@ namespace Pixiview.Illust
             {
                 MainThread.BeginInvokeOnMainThread(async () =>
                 {
-                    var service = DependencyService.Get<IFileStore>();
-                    var result = await service.SaveImageToGalleryAsync(image);
+                    var result = await FileStore.SaveImageToGalleryAsync(image);
 
                     string message = result ?? ResourceHelper.SaveSuccess;
                     await DisplayAlert(ResourceHelper.Title, message, ResourceHelper.Ok);
diff --git a/Pixiview/Pixiview.projitems b/Pixiview/Pixiview.projitems
index 4e66d52..29c7c9b 100644
--- a/Pixiview/Pixiview.projitems
+++ b/Pixiview/Pixiview.projitems
@@ -73,8 +73,8 @@
     </Compile>
     <Compile Include="$(MSBuildThisFileDirectory)Utils\Converters.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Utils\Extensions.cs" />
-    <Compile Include="$(MSBuildThisFileDirectory)Utils\IEnvironmentService.cs" />
-    <Compile Include="$(MSBuildThisFileDirectory)Utils\IFileStore.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Utils\EnvironmentService.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Utils\FileStore.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Utils\IllustData.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Utils\LongPressEffect.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Utils\Stores.cs" />
diff --git a/Pixiview/UI/StyleDefinition.cs b/Pixiview/UI/StyleDefinition.cs
index 53d8632..989c9dd 100644
--- a/Pixiview/UI/StyleDefinition.cs
+++ b/Pixiview/UI/StyleDefinition.cs
@@ -7,13 +7,8 @@ namespace Pixiview.UI
     public static class StyleDefinition
     {
         public const double FontSizeTitle = 18.0;
-        public const double FontSizeTitleIcon = 24.0;
 
         public static readonly Thickness ScreenBottomPadding;
-        public static readonly Thickness HorizonLeft10 = new Thickness(10, 0, 0, 0);
-        public static readonly Thickness HorizonRight10 = new Thickness(0, 0, 10, 0);
-        public static readonly Thickness LeftBottom10 = new Thickness(10, 0, 0, 10);
-        public static readonly GridLength TitleIconWidth = 40;
         public static readonly Color ColorLightShadow = Color.FromRgba(0, 0, 0, 0x20);
         public static readonly Color ColorDeepShadow = Color.FromRgba(0, 0, 0, 0x50);
         public static readonly Color ColorRedBackground = Color.FromRgb(0xfd, 0x43, 0x63);
@@ -22,6 +17,16 @@ namespace Pixiview.UI
         public static readonly double FontSizeMicro = Device.GetNamedSize(NamedSize.Micro, typeof(Label));
         public static readonly double FontSizeSmall = Device.GetNamedSize(NamedSize.Small, typeof(Label));
 
+#if __IOS__
+        public const string IconLightFontFamily = "FontAwesome5Pro-Light";
+        public const string IconRegularFontFamily = "FontAwesome5Pro-Regular";
+        public const string IconSolidFontFamily = "FontAwesome5Pro-Solid";
+
+        public const string IconLeft = "\uf104";
+#else
+        // TODO
+#endif
+
         public const string IconUser = "\uf007";
         public const string IconSparkles = "\uf890";
         public const string IconOrder = "\uf88f";
@@ -29,7 +34,6 @@ namespace Pixiview.UI
         public const string IconRefresh = "\uf2f1";
         public const string IconLove = "\uf004";
         public const string IconOption = "\uf013";
-        public const string IconDownload = "\uf019";
         public const string IconFavorite = "\uf02e";
         public const string IconShare = "\uf35d";
 
diff --git a/Pixiview/UI/Theme/ThemeBase.cs b/Pixiview/UI/Theme/ThemeBase.cs
index 81721ac..4f01f1e 100644
--- a/Pixiview/UI/Theme/ThemeBase.cs
+++ b/Pixiview/UI/Theme/ThemeBase.cs
@@ -11,7 +11,6 @@ namespace Pixiview.UI.Theme
         public const string FontIconLove = nameof(FontIconLove);
         public const string FontIconNotLove = nameof(FontIconNotLove);
         public const string FontIconOption = nameof(FontIconOption);
-        public const string FontIconDownload = nameof(FontIconDownload);
         public const string FontIconFavorite = nameof(FontIconFavorite);
         public const string FontIconShare = nameof(FontIconShare);
 
@@ -29,36 +28,20 @@ namespace Pixiview.UI.Theme
         public const string IconLightFontFamily = nameof(IconLightFontFamily);
         public const string IconRegularFontFamily = nameof(IconRegularFontFamily);
         public const string IconSolidFontFamily = nameof(IconSolidFontFamily);
-        public const string IconLeft = nameof(IconLeft);
-        public const string FontSizeTitle = nameof(FontSizeTitle);
-        public const string FontSizeTitleIcon = nameof(FontSizeTitleIcon);
         //public const string Horizon10 = nameof(Horizon10);
         public const string ScreenBottomPadding = nameof(ScreenBottomPadding);
-        public const string NavigationBarHeight = nameof(NavigationBarHeight);
-        public const string IconRefresh = nameof(IconRefresh);
-        public const string IconOption = nameof(IconOption);
-        public const string IconDownload = nameof(IconDownload);
 
         protected void InitResources()
         {
-            Add(FontSizeTitle, StyleDefinition.FontSizeTitle);
-            Add(FontSizeTitleIcon, StyleDefinition.FontSizeTitleIcon);
             //Add(Horizon10, StyleDefinition.Horizon10);
             Add(ScreenBottomPadding, StyleDefinition.ScreenBottomPadding);
-            Add(IconRefresh, StyleDefinition.IconRefresh);
-            Add(IconOption, StyleDefinition.IconOption);
-            Add(IconDownload, StyleDefinition.IconDownload);
 
-            if (App.ExtraResources != null)
-            {
-                foreach (var kv in App.ExtraResources)
-                {
-                    Add(kv.Key, kv.Value);
-                }
-            }
+            Add(IconLightFontFamily, StyleDefinition.IconLightFontFamily);
+            Add(IconRegularFontFamily, StyleDefinition.IconRegularFontFamily);
+            Add(IconSolidFontFamily, StyleDefinition.IconSolidFontFamily);
 
-            var regularFontFamily = (string)this[IconRegularFontFamily];
-            var solidFontFamily = (string)this[IconSolidFontFamily];
+            var regularFontFamily = StyleDefinition.IconRegularFontFamily;
+            var solidFontFamily = StyleDefinition.IconSolidFontFamily;
 
             Add(FontIconLove, GetSolidIcon(StyleDefinition.IconLove, solidFontFamily, StyleDefinition.ColorRedBackground));
             Add(FontIconUser, GetSolidIcon(StyleDefinition.IconUser, solidFontFamily));
@@ -67,7 +50,6 @@ namespace Pixiview.UI.Theme
             Add(FontIconRefresh, GetSolidIcon(StyleDefinition.IconRefresh, solidFontFamily));
             Add(FontIconNotLove, GetSolidIcon(StyleDefinition.IconLove, regularFontFamily));
             Add(FontIconOption, GetSolidIcon(StyleDefinition.IconOption, solidFontFamily));
-            Add(FontIconDownload, GetSolidIcon(StyleDefinition.IconDownload, solidFontFamily));
             Add(FontIconFavorite, GetSolidIcon(StyleDefinition.IconFavorite, solidFontFamily));
             Add(FontIconShare, GetSolidIcon(StyleDefinition.IconShare, solidFontFamily));
         }
diff --git a/Pixiview.iOS/Services/EnvironmentService.cs b/Pixiview/Utils/EnvironmentService.cs
similarity index 85%
rename from Pixiview.iOS/Services/EnvironmentService.cs
rename to Pixiview/Utils/EnvironmentService.cs
index b8e9777..2028d10 100644
--- a/Pixiview.iOS/Services/EnvironmentService.cs
+++ b/Pixiview/Utils/EnvironmentService.cs
@@ -1,30 +1,16 @@
 using System.Diagnostics.CodeAnalysis;
-using System.Globalization;
+using System.Globalization;
 using System.Threading;
-using Foundation;
-using Pixiview.iOS.Services;
 using Pixiview.Resources;
-using Pixiview.Utils;
+#if __IOS__
+using Foundation;
 using UIKit;
-using Xamarin.Forms;
+#endif
 
-[assembly: Dependency(typeof(EnvironmentService))]
-namespace Pixiview.iOS.Services
+namespace Pixiview.Utils
 {
-    public class EnvironmentService : IEnvironmentService
+    public class EnvironmentService
     {
-        public EnvironmentParameter GetEnvironment()
-        {
-            return new EnvironmentParameter
-            {
-                IconLightFontFamily = "FontAwesome5Pro-Light",
-                IconRegularFontFamily = "FontAwesome5Pro-Regular",
-                IconSolidFontFamily = "FontAwesome5Pro-Solid",
-
-                IconLeft = "\uf104"     // for android, it's "\uf060"
-            };
-        }
-
         #region - Theme -
 
         /*
@@ -54,18 +40,11 @@ namespace Pixiview.iOS.Services
         }
         //*/
 
-        public void SetStatusBarStyle(StatusBarStyles style)
+        public static void SetStatusBarStyle(StatusBarStyles style)
         {
             SetStatusBarStyle(ConvertStyle(style));
         }
 
-        public void SetStatusBarColor(Color color)
-        {
-            // nothing need to do
-        }
-
-        #endregion
-
         public static void SetStatusBarStyle(UIStatusBarStyle style)
         {
             if (UIApplication.SharedApplication.StatusBarStyle == style)
@@ -100,9 +79,19 @@ namespace Pixiview.iOS.Services
             }
         }
 
+        #endregion
+
         #region - Culture Info -
 
-        public CultureInfo GetCurrentCultureInfo()
+        public static void SetCultureInfo(CultureInfo ci)
+        {
+            Thread.CurrentThread.CurrentCulture = ci;
+            Thread.CurrentThread.CurrentUICulture = ci;
+
+            App.DebugPrint($"CurrentCulture set: {ci.Name}");
+        }
+
+        public static CultureInfo GetCurrentCultureInfo()
         {
             string lang;
             if (NSLocale.PreferredLanguages.Length > 0)
@@ -140,7 +129,7 @@ namespace Pixiview.iOS.Services
         }
 
         [SuppressMessage("Style", "IDE1006:Naming Styles", Justification = "<Pending>")]
-        string iOSToDotnetLanguage(string iOSLanguage)
+        private static string iOSToDotnetLanguage(string iOSLanguage)
         {
             string netLanguage;
 
@@ -165,7 +154,7 @@ namespace Pixiview.iOS.Services
             return netLanguage;
         }
 
-        string ToDotnetFallbackLanguage(PlatformCulture platCulture)
+        private static string ToDotnetFallbackLanguage(PlatformCulture platCulture)
         {
             string netLanguage;
 
@@ -189,14 +178,6 @@ namespace Pixiview.iOS.Services
             return netLanguage;
         }
 
-        public void SetCultureInfo(CultureInfo ci)
-        {
-            Thread.CurrentThread.CurrentCulture = ci;
-            Thread.CurrentThread.CurrentUICulture = ci;
-
-            App.DebugPrint($"CurrentCulture set: {ci.Name}");
-        }
-
         #endregion
     }
 }
diff --git a/Pixiview.iOS/Services/FileStore.cs b/Pixiview/Utils/FileStore.cs
similarity index 80%
rename from Pixiview.iOS/Services/FileStore.cs
rename to Pixiview/Utils/FileStore.cs
index 3e29a7c..bf82036 100644
--- a/Pixiview.iOS/Services/FileStore.cs
+++ b/Pixiview/Utils/FileStore.cs
@@ -1,17 +1,18 @@
-using System.Threading.Tasks;
-using Pixiview.iOS.Services;
-using Pixiview.Utils;
+using System.Threading.Tasks;
 using Xamarin.Forms;
+#if __IOS__
 using Xamarin.Forms.Platform.iOS;
+#else
+using Xamarin.Forms.Platform.Android;
+#endif
 
-[assembly: Dependency(typeof(FileStore))]
-namespace Pixiview.iOS.Services
+namespace Pixiview.Utils
 {
-    public class FileStore : IFileStore
+    public class FileStore
     {
-
-        public Task<string> SaveImageToGalleryAsync(ImageSource image)
+        public static Task<string> SaveImageToGalleryAsync(ImageSource image)
         {
+#if __IOS__
             IImageSourceHandler renderer;
             if (image is UriImageSource)
             {
@@ -40,6 +41,9 @@ namespace Pixiview.iOS.Services
                 });
             }
             return task.Task;
+#else
+            // TODO
+#endif
         }
     }
 }
diff --git a/Pixiview/Utils/IEnvironmentService.cs b/Pixiview/Utils/IEnvironmentService.cs
deleted file mode 100644
index 63be4ee..0000000
--- a/Pixiview/Utils/IEnvironmentService.cs
+++ /dev/null
@@ -1,25 +0,0 @@
-using System.Globalization;
-using Xamarin.Forms;
-
-namespace Pixiview.Utils
-{
-    public interface IEnvironmentService
-    {
-        EnvironmentParameter GetEnvironment();
-
-        //AppTheme GetApplicationTheme();
-        void SetStatusBarStyle(StatusBarStyles style);
-        void SetStatusBarColor(Color color);
-
-        CultureInfo GetCurrentCultureInfo();
-        void SetCultureInfo(CultureInfo ci);
-    }
-
-    public class EnvironmentParameter
-    {
-        public string IconLightFontFamily { get; set; }
-        public string IconRegularFontFamily { get; set; }
-        public string IconSolidFontFamily { get; set; }
-        public string IconLeft { get; set; }
-    }
-}
diff --git a/Pixiview/Utils/IFileStore.cs b/Pixiview/Utils/IFileStore.cs
deleted file mode 100644
index bfba038..0000000
--- a/Pixiview/Utils/IFileStore.cs
+++ /dev/null
@@ -1,10 +0,0 @@
-using System.Threading.Tasks;
-using Xamarin.Forms;
-
-namespace Pixiview.Utils
-{
-    public interface IFileStore
-    {
-        Task<string> SaveImageToGalleryAsync(ImageSource image);
-    }
-}