diff --git a/Schemas/MainWindow.xaml b/Schemas/MainWindow.xaml
index 7a7aa94..005d13d 100644
--- a/Schemas/MainWindow.xaml
+++ b/Schemas/MainWindow.xaml
@@ -157,18 +157,23 @@
             <Setter Property="Margin" Value="8,0,8,0"/>
         </Style>
 
-        <!-- Column widths for the app table rows and header (dot | name | description | id) -->
+        <!-- Column widths for the app table rows and header (indicator | name | description | id) -->
         <GridLength x:Key="AppTableDotColWidth">16</GridLength>
         <GridLength x:Key="AppTableNameColWidth">180</GridLength>
         <GridLength x:Key="AppTableDescColWidth">1*</GridLength>
         <GridLength x:Key="AppTableIdColWidth">261</GridLength>
 
-        <!-- Recommendation dot shape style for app table rows -->
-        <Style x:Key="AppRecommendationDotStyle" TargetType="Ellipse">
+        <!-- Recommendation indicator style shared by circles, diamonds, and triangles -->
+        <Style x:Key="AppRecommendationIndicatorStyle" TargetType="Shape">
             <Setter Property="Width" Value="9"/>
             <Setter Property="Height" Value="9"/>
             <Setter Property="HorizontalAlignment" Value="Left"/>
             <Setter Property="VerticalAlignment" Value="Center"/>
+            <Setter Property="RenderTransform">
+                <Setter.Value>
+                    <TranslateTransform Y="1"/>
+                </Setter.Value>
+            </Setter>
         </Style>
 
         <!-- Container style for each dynamically-created app table row -->
@@ -184,7 +189,7 @@
         <SolidColorBrush x:Key="ValidationErrorColor" Color="#c42b1c"/>
         <SolidColorBrush x:Key="ValidationSuccessColor" Color="#28a745"/>
 
-        <!-- App recommendation dot / legend colors -->
+        <!-- App recommendation indicator / legend colors -->
         <SolidColorBrush x:Key="AppRecommendationSafeColor" Color="#4CAF50"/>
         <SolidColorBrush x:Key="AppRecommendationOptionalColor" Color="#FFC107"/>
         <SolidColorBrush x:Key="AppRecommendationUnsafeColor" Color="#F44336"/>
@@ -710,12 +715,12 @@
                                     </StackPanel>
                                     <!-- Optional (default) -->
                                     <StackPanel Orientation="Horizontal" Margin="0,0,16,0" ToolTip="%LANG:AppLegendOptionalTooltip%">
-                                        <Ellipse Width="9" Height="9" Fill="{DynamicResource AppRecommendationOptionalColor}" VerticalAlignment="Center" Margin="0,0,6,0"/>
+                                        <Polygon Points="4.5,0 9,4.5 4.5,9 0,4.5" Stretch="Fill" Width="9" Height="9" Fill="{DynamicResource AppRecommendationOptionalColor}" VerticalAlignment="Center" Margin="0,0,6,0"/>
                                         <TextBlock Text="%LANG:AppLegendOptional%" Foreground="{DynamicResource AppFgColor}" FontSize="12" VerticalAlignment="Center" Opacity="0.8"/>
                                     </StackPanel>
                                     <!-- Not Recommended (unsafe) -->
                                     <StackPanel Orientation="Horizontal" ToolTip="%LANG:AppLegendNotRecommendedTooltip%">
-                                        <Ellipse Width="9" Height="9" Fill="{DynamicResource AppRecommendationUnsafeColor}" VerticalAlignment="Center" Margin="0,0,6,0"/>
+                                        <Polygon Points="0,9 4.5,0 9,9" Stretch="Fill" Width="9" Height="9" Fill="{DynamicResource AppRecommendationUnsafeColor}" VerticalAlignment="Center" Margin="0,0,6,0"/>
                                         <TextBlock Text="%LANG:AppLegendNotRecommended%" Foreground="{DynamicResource AppFgColor}" FontSize="12" VerticalAlignment="Center" Opacity="0.8"/>
                                     </StackPanel>
                                 </StackPanel>
diff --git a/Scripts/GUI/MainWindow-AppSelection.ps1 b/Scripts/GUI/MainWindow-AppSelection.ps1
index e5d423d..501c2cc 100644
--- a/Scripts/GUI/MainWindow-AppSelection.ps1
+++ b/Scripts/GUI/MainWindow-AppSelection.ps1
@@ -431,7 +431,7 @@ function Add-AppsToMainWindow {
         $checkbox.IsChecked = $app.IsChecked
         $checkbox.Style = $Window.Resources['AppsPanelCheckBoxStyle']
 
-        # Build table row: Recommendation dot | Name | Description | App ID
+        # Build table row: Recommendation indicator | Name | Description | App ID
         $row = New-Object System.Windows.Controls.Grid
         $row.Style = $Window.Resources['AppTableRowStyle']
         $c0 = New-Object System.Windows.Controls.ColumnDefinition; $c0.Width = $Window.Resources['AppTableDotColWidth']
@@ -441,16 +441,30 @@ function Add-AppsToMainWindow {
         $row.ColumnDefinitions.Add($c0); $row.ColumnDefinitions.Add($c1)
         $row.ColumnDefinitions.Add($c2); $row.ColumnDefinitions.Add($c3)
 
-        $dot = New-Object System.Windows.Shapes.Ellipse
-        $dot.Style = $Window.Resources['AppRecommendationDotStyle']
-        $dot.Fill = switch ($app.Recommendation) { 'safe' { $brushSafe } 'unsafe' { $brushUnsafe } default { $brushDefault } }
+        $indicator = switch ($app.Recommendation) {
+            'safe' { New-Object System.Windows.Shapes.Ellipse }
+            'unsafe' {
+                $triangle = New-Object System.Windows.Shapes.Polygon
+                $triangle.Points = [System.Windows.Media.PointCollection]::Parse('0,9 4.5,0 9,9')
+                $triangle.Stretch = 'Fill'
+                $triangle
+            }
+            default {
+                $diamond = New-Object System.Windows.Shapes.Polygon
+                $diamond.Points = [System.Windows.Media.PointCollection]::Parse('4.5,0 9,4.5 4.5,9 0,4.5')
+                $diamond.Stretch = 'Fill'
+                $diamond
+            }
+        }
+        $indicator.Style = $Window.Resources['AppRecommendationIndicatorStyle']
+        $indicator.Fill = switch ($app.Recommendation) { 'safe' { $brushSafe } 'unsafe' { $brushUnsafe } default { $brushDefault } }
         $recommendationKey = switch ($app.Recommendation) {
             'safe'   { 'AppLegendRecommendedTooltip' }
             'unsafe' { 'AppLegendNotRecommendedTooltip' }
             default  { 'AppLegendOptionalTooltip' }
         }
-        $dot.SetResourceReference([System.Windows.FrameworkElement]::ToolTipProperty, "Language_$recommendationKey")
-        [System.Windows.Controls.Grid]::SetColumn($dot, 0)
+        $indicator.SetResourceReference([System.Windows.FrameworkElement]::ToolTipProperty, "Language_$recommendationKey")
+        [System.Windows.Controls.Grid]::SetColumn($indicator, 0)
 
         $tbName = New-Object System.Windows.Controls.TextBlock
         $tbName.Text = $app.FriendlyName
@@ -469,7 +483,7 @@ function Add-AppsToMainWindow {
         $tbId.ToolTip = $app.AppIdDisplay
         [System.Windows.Controls.Grid]::SetColumn($tbId, 3)
 
-        $row.Children.Add($dot) | Out-Null
+        $row.Children.Add($indicator) | Out-Null
         $row.Children.Add($tbName) | Out-Null
         $row.Children.Add($tbDesc) | Out-Null
         $row.Children.Add($tbId) | Out-Null