diff --git a/src/DodoSSH.Client.App/Assets/dodossh-icon.ps1 b/src/DodoSSH.Client.App/Assets/dodossh-icon.ps1
new file mode 100644
index 0000000..0093416
--- /dev/null
+++ b/src/DodoSSH.Client.App/Assets/dodossh-icon.ps1
@@ -0,0 +1,124 @@
+# Regenerates dodossh.ico from the same geometry the Android launcher icon draws.
+#
+# The phone's mark is a vector — Resources/drawable/ic_launcher_foreground.xml — and the whole
+# reason it is a vector is that there is then one geometry to change and no set of PNG densities
+# to forget one of. Windows will not take a vector: <ApplicationIcon> wants an .ico and nothing
+# else, and Window.Icon wants a bitmap. So the raster exists, and this script is how it stays
+# honest: the numbers below are the ones in that XML, and regenerating is the whole edit.
+#
+#     pwsh -File src/DodoSSH.Client.App/Assets/dodossh-icon.ps1
+#
+# Coordinates are the launcher's 108-unit viewport, mapped so the middle 72 fills the canvas.
+# That 72 is not an arbitrary crop: it is the part of an adaptive icon a launcher actually shows,
+# the outer 18 on each edge being what it eats for masking and parallax. Rendering the whole 108
+# here would draw the mark at 39% of the width — correct arithmetic, and a stamp lost in a field
+# of background. Matching what the phone displays means matching the 72.
+
+Set-StrictMode -Version Latest
+$ErrorActionPreference = 'Stop'
+Add-Type -AssemblyName System.Drawing
+
+$window = [System.Drawing.ColorTranslator]::FromHtml('#0E1220')  # dodo_window / CanvasColor
+$accent = [System.Drawing.ColorTranslator]::FromHtml('#5B8CFF')  # AccentColor
+
+# Every size Windows asks for: 16 in a titlebar and a tree, 32 on the desktop, 48 in a large-icon
+# view, 256 for the preview pane. Shipping fewer means Windows downsamples one of these to fill
+# the gap, and its downsampler is not kind to a hairline.
+$sizes = @(16, 20, 24, 32, 40, 48, 64, 128, 256)
+
+function New-MarkPng([int]$size)
+{
+    $bitmap = New-Object System.Drawing.Bitmap($size, $size, [System.Drawing.Imaging.PixelFormat]::Format32bppArgb)
+    $g = [System.Drawing.Graphics]::FromImage($bitmap)
+    $g.SmoothingMode = [System.Drawing.Drawing2D.SmoothingMode]::AntiAlias
+    $g.PixelOffsetMode = [System.Drawing.Drawing2D.PixelOffsetMode]::HighQuality
+
+    # The background, rounded as a launcher mask rounds it. A square-cornered tile would be the
+    # one icon on the taskbar with corners, which reads as unfinished rather than as deliberate.
+    $radius = [double]$size * 0.22
+    $d = $radius * 2.0
+    $path = New-Object System.Drawing.Drawing2D.GraphicsPath
+    $path.AddArc(0.0, 0.0, $d, $d, 180, 90)
+    $path.AddArc($size - $d, 0.0, $d, $d, 270, 90)
+    $path.AddArc($size - $d, $size - $d, $d, $d, 0, 90)
+    $path.AddArc(0.0, $size - $d, $d, $d, 90, 90)
+    $path.CloseFigure()
+    $brush = New-Object System.Drawing.SolidBrush($window)
+    $g.FillPath($brush, $path)
+
+    # 108-viewport units to pixels, with the outer 18 dropped on each edge.
+    $scale = [double]$size / 72.0
+    function P([double]$x, [double]$y) { New-Object System.Drawing.PointF((($x - 18.0) * $scale), (($y - 18.0) * $scale)) }
+
+    # A stroke thinner than a pixel renders as a grey suggestion of itself, which at 16px is the
+    # difference between a mark and a smudge. The phone's file already bumps these widths for the
+    # same reason at 48dp; the floor is that argument carried down to the sizes Windows asks for.
+    function Pen([double]$units)
+    {
+        $pen = New-Object System.Drawing.Pen($accent, [float][Math]::Max($units * $scale, 1.0))
+        $pen.StartCap = [System.Drawing.Drawing2D.LineCap]::Round
+        $pen.EndCap = [System.Drawing.Drawing2D.LineCap]::Round
+        $pen.LineJoin = [System.Drawing.Drawing2D.LineJoin]::Round
+        return $pen
+    }
+
+    # The box: 42 across, centred, square-cornered as the Border in the app is.
+    $box = Pen 2.2
+    $g.DrawPolygon($box, @((P 33 33), (P 75 33), (P 75 75), (P 33 75)))
+
+    # The chevron of >_ and the underscore on the baseline it bottoms out at.
+    $ink = Pen 2.8
+    $g.DrawLines($ink, @((P 44.8 48.75), (P 51.9 54), (P 44.8 59.25)))
+    $g.DrawLine($ink, (P 54 59.7), (P 63.2 59.7))
+
+    $stream = New-Object System.IO.MemoryStream
+    $bitmap.Save($stream, [System.Drawing.Imaging.ImageFormat]::Png)
+
+    $box.Dispose(); $ink.Dispose(); $brush.Dispose(); $path.Dispose(); $g.Dispose(); $bitmap.Dispose()
+    return $stream.ToArray()
+}
+
+# ICO is a six-byte header, a sixteen-byte directory entry per image, then the images. The entries
+# carry PNG payloads rather than the older BMP-with-AND-mask form, which every Windows since Vista
+# reads and which is what keeps a 256px entry from costing 256KB.
+#
+# The cast on each frame is load-bearing. A byte[] returned through PowerShell's output collector
+# comes back as Object[] of boxed bytes, which BinaryWriter has no overload for — it binds to one
+# of the scalar Write()s instead and puts a single byte on the stream. The first run of this
+# script produced a 159-byte .ico that way, header and directory intact and nine one-byte images.
+$frames = New-Object 'System.Collections.Generic.List[byte[]]'
+foreach ($size in $sizes)
+{
+    [byte[]]$png = New-MarkPng $size
+    $frames.Add($png)
+}
+
+$out = New-Object System.IO.MemoryStream
+$w = New-Object System.IO.BinaryWriter($out)
+$w.Write([uint16]0)             # reserved
+$w.Write([uint16]1)             # type: icon
+$w.Write([uint16]$sizes.Count)
+
+$offset = 6 + (16 * $sizes.Count)
+for ($i = 0; $i -lt $sizes.Count; $i++)
+{
+    $size = $sizes[$i]
+    $w.Write([byte]($(if ($size -ge 256) { 0 } else { $size })))  # 0 means 256
+    $w.Write([byte]($(if ($size -ge 256) { 0 } else { $size })))
+    $w.Write([byte]0)           # palette entries: none, this is truecolour
+    $w.Write([byte]0)           # reserved
+    $w.Write([uint16]1)         # colour planes
+    $w.Write([uint16]32)        # bits per pixel
+    $w.Write([uint32]$frames[$i].Length)
+    $w.Write([uint32]$offset)
+    $offset += $frames[$i].Length
+}
+
+foreach ($frame in $frames) { $w.Write($frame) }
+$w.Flush()
+
+$target = Join-Path $PSScriptRoot 'dodossh.ico'
+[System.IO.File]::WriteAllBytes($target, $out.ToArray())
+$w.Dispose(); $out.Dispose()
+
+Write-Output "Wrote $target ($($sizes.Count) sizes, $((Get-Item $target).Length) bytes)"
diff --git a/src/DodoSSH.Client.App/Assets/dodossh.ico b/src/DodoSSH.Client.App/Assets/dodossh.ico
new file mode 100644
index 0000000..c3326f9
Binary files /dev/null and b/src/DodoSSH.Client.App/Assets/dodossh.ico differ
diff --git a/src/DodoSSH.Client.App/DodoSSH.Client.App.csproj b/src/DodoSSH.Client.App/DodoSSH.Client.App.csproj
index c52905d..38f9352 100644
--- a/src/DodoSSH.Client.App/DodoSSH.Client.App.csproj
+++ b/src/DodoSSH.Client.App/DodoSSH.Client.App.csproj
@@ -5,6 +5,14 @@
     <ApplicationManifest>app.manifest</ApplicationManifest>
     <AvaloniaUseCompiledBindingsByDefault>true</AvaloniaUseCompiledBindingsByDefault>
 
+    <!--
+      The icon on the executable itself — what Explorer, the Start menu and a pinned taskbar button
+      draw, all of which read it from the PE resource and never start the process. Window.Icon in
+      MainWindow.axaml is a separate thing that only exists once the application is running; both are
+      needed, and both point at this file.
+    -->
+    <ApplicationIcon>Assets/dodossh.ico</ApplicationIcon>
+
     <!--
       False here, unlike every server project. The root Directory.Build.props sets it true because
       the API is container-hosted, UTC-only and has no business formatting anything for a human.
@@ -15,6 +23,14 @@
     <InvariantGlobalization>false</InvariantGlobalization>
   </PropertyGroup>
 
+  <ItemGroup>
+    <!--
+      Named rather than globbed as Assets/**, because the folder also holds the script that draws the
+      icon and a build has no reason to carry a copy of it around inside the binary.
+    -->
+    <AvaloniaResource Include="Assets/dodossh.ico" />
+  </ItemGroup>
+
   <ItemGroup>
     <PackageReference Include="Avalonia" />
     <PackageReference Include="Avalonia.Desktop" />
diff --git a/src/DodoSSH.Client.App/Views/MainWindow.axaml b/src/DodoSSH.Client.App/Views/MainWindow.axaml
index 4888f41..f2d1f9b 100644
--- a/src/DodoSSH.Client.App/Views/MainWindow.axaml
+++ b/src/DodoSSH.Client.App/Views/MainWindow.axaml
@@ -6,6 +6,7 @@
         x:Class="DodoSSH.Client.App.Views.MainWindow"
         x:DataType="vm:MainWindowViewModel"
         Title="DodoSSH"
+        Icon="/Assets/dodossh.ico"
         Width="1180"
         Height="760"
         MinWidth="1016"