diff --git a/public/brand/niramay-icon-384.png b/public/brand/niramay-icon-384.png
index 80bad53..f2ecbbc 100644
Binary files a/public/brand/niramay-icon-384.png and b/public/brand/niramay-icon-384.png differ
diff --git a/public/brand/niramay-icon-launcher-512.png b/public/brand/niramay-icon-launcher-512.png
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Binary files a/public/brand/niramay-icon-launcher-512.png and b/public/brand/niramay-icon-launcher-512.png differ
diff --git a/tests/niramay-brand-assets.test.ts b/tests/niramay-brand-assets.test.ts
new file mode 100644
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--- /dev/null
+++ b/tests/niramay-brand-assets.test.ts
@@ -0,0 +1,51 @@
+/**
+ * Niramay brand-asset fingerprints (Phase 3, 2026-10-16).
+ *
+ * The Niramay APK launcher icons are baked at build time by
+ * lib/apk-builder.ts from the ICON_URL input, which points at
+ * public/brand/niramay-icon-launcher-512.png. A silent reversion of that
+ * file (or the marketplace listing icon) would rebuild or relist the OLD
+ * mortar-and-pestle branding without any test noticing. These pins make
+ * the platform suite fail first.
+ *
+ * Source of truth: the supplied official Niramay artwork (complete
+ * composition — symbol + NIRAMAY wordmark + DISCOVER • HEAL • LIVE BETTER
+ * tagline, 1254x1254 cream background).
+ */
+import { describe, it, expect } from 'vitest';
+import { createHash } from 'node:crypto';
+import { readFileSync } from 'node:fs';
+
+const sha256 = (p: string) =>
+  createHash('sha256').update(readFileSync(p)).digest('hex');
+
+// Deterministic whole-artwork derivatives of the supplied master.
+const PINS: Record<string, string> = {
+  // complete artwork, 512x512, LANCZOS downscale of the whole square
+  'public/brand/niramay-icon-launcher-512.png':
+    '3e38d2f8e6c3c169902d3db6e057b0d100ae72d50982d9820ae320b32d2828d0',
+  // complete artwork, 384x384, LANCZOS downscale of the whole square
+  'public/brand/niramay-icon-384.png':
+    'b380efaa0da3dec578622b96cd780791acd1f6f332414f073de73c7e48ba8a93',
+};
+
+describe('Niramay official brand assets (Phase 3)', () => {
+  it.each(Object.entries(PINS))('pins %s to the complete official artwork', (path, expected) => {
+    expect(sha256(path as string)).toBe(expected);
+  });
+
+  it('the launcher input and the listing icon are whole-square artwork (no symbol-only crop)', () => {
+    // Both files are 512/384 squares derived from the same 1254px master:
+    // the complete composition occupies ~69% of the canvas width. A
+    // symbol-only extraction would show a much narrower content column.
+    // (Full pixel-decode geometry is enforced by the niramay repo's own
+    // scripts/verify-branding.ts suite; these platform pins guard the
+    // exact bytes the APK build and marketplace consume.)
+    for (const path of Object.keys(PINS)) {
+      const buf = readFileSync(path);
+      const w = buf.readUInt32BE(16);
+      const h = buf.readUInt32BE(20);
+      expect(w).toBe(h);
+    }
+  });
+});