diff --git a/CHANGELOG.md b/CHANGELOG.md
index 245b16e..d52ff77 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Changed
+- **A new app icon.** An off-white arch bridge on black, with three
+  turquoise dots above it. It replaces the bar chart over an arc.
+  `assets/icon.svg` is the source, and `scripts/generate-icon.py` writes the
+  PNG, ICNS and ICO from it.
 ### Added
 - **Simplified Chinese.** Every page, dialog, the menu bar panel, its tray
   menu and the system notifications are translated into 简体中文, and
diff --git a/assets/icon.icns b/assets/icon.icns
index ad77410..f46e826 100644
Binary files a/assets/icon.icns and b/assets/icon.icns differ
diff --git a/assets/icon.ico b/assets/icon.ico
index 144bd8f..4853734 100644
Binary files a/assets/icon.ico and b/assets/icon.ico differ
diff --git a/assets/icon.png b/assets/icon.png
index beb21b7..4427f5a 100644
Binary files a/assets/icon.png and b/assets/icon.png differ
diff --git a/assets/icon.svg b/assets/icon.svg
new file mode 100644
index 0000000..9a1113f
--- /dev/null
+++ b/assets/icon.svg
@@ -0,0 +1,7 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1024 1024">
+<rect x="100" y="100" width="824" height="824" rx="186" fill="#0B0B0B"/>
+<path fill="#F5EDE2" fill-rule="evenodd" d="M198.7 683.3C195.7 682.5 209.4 663.1 231.3 637.2C235 632.9 239.3 627.8 240.9 625.8C276.2 583.5 281.9 541.2 254 528.7C242.7 523.6 232.4 522.7 195.4 523.4C176 523.7 174.4 523.5 170.4 520C163.9 514.3 169 506.6 183.1 500.9C243 476.7 316.3 467.2 417.3 470.7C436.5 471.3 469.3 472.7 487.5 473.6C491 473.8 498.3 474.2 503.7 474.4C594.3 478.9 613.9 480.9 680.3 491.9C742.5 502.2 773.9 505.4 830.9 507.4C848.7 508 852 508.6 854.9 511.7C859.9 517.3 852.8 521.4 833.8 524C818.4 526.1 813.2 527.3 806 530.1C777.6 541.4 760.6 573.4 767.8 601.8C771.2 614.8 775.3 622.7 789.6 642.9C802 660.6 814.6 680 815 681.9C815.3 683.6 817.3 683.5 772.9 683.5C727.5 683.5 730.6 683.7 730.6 681.7C730.6 651.2 714 607.8 691.7 580.2C645.4 522.7 582 507.3 495.4 532.5C413.8 556.3 352.4 604.9 308.9 680C308 681.6 307 682.9 306.6 683.1C305.8 683.5 200.1 683.7 198.7 683.3Z M300.4 599.9C301.5 599.2 306.4 595.4 311.2 591.4C358.9 552.8 394 532.9 453.9 510.6C459.9 508.4 466 506.1 467.4 505.6C476.5 502.2 465.4 501 424.5 501C342.2 501 319.6 509.5 303.9 546.4C298 560.2 293.4 584.7 294.7 596C295.3 601.8 296.6 602.7 300.4 599.9Z M732.2 573.8C734 572.7 735.8 570 738.8 564C741.3 559.1 746.2 550.1 748.8 545.9C759.5 528.4 756.1 524.1 728.6 520.7C711.8 518.6 701 517.9 682.1 517.9C661 517.9 661.4 517.7 671.2 525.9C686.8 538.8 692.1 543.5 705.6 555.5C729.1 576.6 728.5 576.2 732.2 573.8Z"/>
+<circle cx="599.7" cy="374.4" r="33.6" fill="#2FCDB4"/>
+<circle cx="433.9" cy="418.4" r="21.1" fill="#2FCDB4"/>
+<circle cx="742.0" cy="430.1" r="25.5" fill="#2FCDB4"/>
+</svg>
diff --git a/docs/icon.png b/docs/icon.png
index 4d74d9c..d8cbd60 100644
Binary files a/docs/icon.png and b/docs/icon.png differ
diff --git a/scripts/generate-icon.py b/scripts/generate-icon.py
new file mode 100644
index 0000000..6d68bde
--- /dev/null
+++ b/scripts/generate-icon.py
@@ -0,0 +1,98 @@
+#!/usr/bin/env python3
+"""Write every icon format the build uses from assets/icon.svg.
+
+The SVG is the source: a rounded tile, one path for the bridge and a circle
+for each of the dots above it, the bills it carries. This script draws those
+itself, so it needs only Pillow and reads nothing else from the file.
+
+    python3 scripts/generate-icon.py      # run from the repo root
+
+Writes assets/icon.png (1024, on the macOS icon grid with its 100px margin),
+assets/icon.icns, assets/icon.ico (the tile filling the square, 16-256) and
+docs/icon.png (256, the site's favicon).
+"""
+import re
+
+from PIL import Image, ImageChops, ImageDraw
+
+SUPERSAMPLE = 4
+CURVE_STEPS = 48
+
+
+def read_source(path="assets/icon.svg"):
+    text = open(path, encoding="utf-8").read()
+    rect = re.search(r'<rect x="(\d+)" y="(\d+)" width="(\d+)" height="(\d+)" rx="(\d+)" fill="(#\w+)"', text)
+    mark = re.search(r'<path fill="(#\w+)" fill-rule="evenodd" d="([^"]+)"', text)
+    circles = [
+        (float(cx), float(cy), float(r), fill)
+        for cx, cy, r, fill in re.findall(r'<circle cx="([\d.]+)" cy="([\d.]+)" r="([\d.]+)" fill="(#\w+)"', text)
+    ]
+    x, y, w, h, r = (int(v) for v in rect.group(1, 2, 3, 4, 5))
+    return (x, y, x + w, y + h), r, rect.group(6), mark.group(1), mark.group(2), circles
+
+
+def flatten(d):
+    """The subpaths of an absolute M/L/C/Z path, as lists of points."""
+    subpaths, at = [], None
+    for cmd, args in re.findall(r"([MLCZ])([^MLCZ]*)", d):
+        n = [float(v) for v in args.split()]
+        if cmd == "M":
+            at = (n[0], n[1])
+            subpaths.append([at])
+        elif cmd == "L":
+            at = (n[0], n[1])
+            subpaths[-1].append(at)
+        elif cmd == "C":
+            x0, y0 = at
+            for i in range(1, CURVE_STEPS + 1):
+                t = i / CURVE_STEPS
+                u = 1 - t
+                a, b, c, e = u * u * u, 3 * u * u * t, 3 * u * t * t, t * t * t
+                subpaths[-1].append(
+                    (a * x0 + b * n[0] + c * n[2] + e * n[4], a * y0 + b * n[1] + c * n[3] + e * n[5])
+                )
+            at = (n[4], n[5])
+    return subpaths
+
+
+def render(size, source):
+    """The icon at `size` px on the macOS grid, with a transparent margin."""
+    tile, radius, tile_fill, mark_fill, d, circles = source
+    k = size * SUPERSAMPLE / 1024
+    w = round(1024 * k)
+    out = Image.new("RGBA", (w, w), (0, 0, 0, 0))
+    draw = ImageDraw.Draw(out)
+    draw.rounded_rectangle([v * k for v in tile], radius=radius * k, fill=tile_fill)
+    # Even-odd, so that a subpath inside another is a hole.
+    mask = Image.new("1", (w, w), 0)
+    for points in flatten(d):
+        layer = Image.new("1", (w, w), 0)
+        ImageDraw.Draw(layer).polygon([(x * k, y * k) for x, y in points], fill=1)
+        mask = ImageChops.logical_xor(mask, layer)
+    out.paste(mark_fill, (0, 0), mask.convert("L"))
+    for cx, cy, r, fill in circles:
+        draw.ellipse([(cx - r) * k, (cy - r) * k, (cx + r) * k, (cy + r) * k], fill=fill)
+    return out.resize((size, size), Image.LANCZOS)
+
+
+def full_bleed(size, source):
+    """The tile filling the whole square, as Windows icons are drawn."""
+    tile = source[0]
+    big = round(size * 1024 / (tile[2] - tile[0]))
+    m = (big - size) // 2
+    return render(big, source).crop((m, m, m + size, m + size))
+
+
+def main():
+    source = read_source()
+    big = render(1024, source)
+    big.save("assets/icon.png")
+    big.save("assets/icon.icns")
+    render(256, source).save("docs/icon.png")
+    sizes = [16, 24, 32, 48, 64, 128, 256]
+    images = [full_bleed(n, source) for n in sizes]
+    images[-1].save("assets/icon.ico", sizes=[(n, n) for n in sizes], append_images=images[:-1])
+
+
+if __name__ == "__main__":
+    main()