diff --git a/.github/workflows/build-and-make.yaml b/.github/workflows/build-and-make.yaml
index 4576a5ee1..056b9880f 100644
--- a/.github/workflows/build-and-make.yaml
+++ b/.github/workflows/build-and-make.yaml
@@ -49,7 +49,7 @@ jobs:
               if: matrix.os == 'linux'
               run: |
                   sudo apt-get update
-                  sudo apt-get install --no-install-recommends -y rpm libarchive-tools flatpak flatpak-builder
+                  sudo apt-get install --no-install-recommends -y rpm libarchive-tools flatpak flatpak-builder appstream
 
                   # Configure Flatpak
                   # 1. Add the Flathub repository (source of runtimes)
@@ -68,6 +68,27 @@ jobs:
             - name: Build backend
               run: pnpm run build:backend
 
+            - name: Validate AppStream metadata
+              if: matrix.os == 'linux'
+              run: appstreamcli validate --pedantic --no-net apps/electron-backend/linux/com.fourgray.iptvnator.metainfo.xml
+
+            - name: Build website
+              if: matrix.os == 'linux'
+              run: pnpm nx build website --skip-nx-cache
+
+            - name: Verify AppStream website assets
+              if: matrix.os == 'linux'
+              shell: bash
+              run: |
+                  set -euo pipefail
+
+                  for screenshot in player playlists epg settings; do
+                      if ! find dist/apps/website -path "*/appstream/${screenshot}.png" -print -quit | grep -q .; then
+                          echo "::error::Missing AppStream website asset for ${screenshot}.png"
+                          exit 1
+                      fi
+                  done
+
             - name: Override macOS arch in electron-builder.json
               if: matrix.os == 'macos'
               run: |
@@ -241,6 +262,7 @@ jobs:
                   fi
 
                   flatpak install --user --noninteractive -y "${FLATPAK_BUNDLE}"
+                  flatpak run --command=sh com.fourgray.iptvnator -c 'test -f /app/share/metainfo/com.fourgray.iptvnator.metainfo.xml'
                   flatpak run --command=sh com.fourgray.iptvnator -c '/app/bin/iptvnator --version'
 
             - name: Upload artifacts (macOS)
diff --git a/apps/electron-backend/linux/com.fourgray.iptvnator.metainfo.xml b/apps/electron-backend/linux/com.fourgray.iptvnator.metainfo.xml
new file mode 100644
index 000000000..161e63e64
--- /dev/null
+++ b/apps/electron-backend/linux/com.fourgray.iptvnator.metainfo.xml
@@ -0,0 +1,63 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<component type="desktop-application">
+  <id>com.fourgray.iptvnator</id>
+  <metadata_license>CC0-1.0</metadata_license>
+  <project_license>MIT</project_license>
+  <name>IPTVnator</name>
+  <developer_name>4gray</developer_name>
+  <update_contact>fourgray@proton.me</update_contact>
+  <summary>Open-source IPTV player for M3U, Xtream Codes, and Stalker portals</summary>
+  <launchable type="desktop-id">com.fourgray.iptvnator.desktop</launchable>
+
+  <description>
+    <p>IPTVnator is a cross-platform IPTV player for user-supplied playlists and portal connections.</p>
+    <p>It supports M3U and M3U8 playlists, Xtream Codes API, and Stalker portals with EPG, catch-up, favorites, and external player integration.</p>
+    <p>The app does not include channels, playlists, or media catalogs. Any IPTV sources, logos, metadata, and programme information come from services the user configures.</p>
+  </description>
+
+  <categories>
+    <category>AudioVideo</category>
+    <category>Player</category>
+    <category>Video</category>
+  </categories>
+
+  <keywords>
+    <keyword>IPTV</keyword>
+    <keyword>M3U</keyword>
+    <keyword>M3U8</keyword>
+    <keyword>EPG</keyword>
+    <keyword>Xtream</keyword>
+    <keyword>Stalker</keyword>
+  </keywords>
+
+  <url type="homepage">https://4gray.github.io/iptvnator/</url>
+  <url type="bugtracker">https://github.com/4gray/iptvnator/issues</url>
+  <url type="vcs-browser">https://github.com/4gray/iptvnator</url>
+  <url type="help">https://4gray.github.io/iptvnator/blog/</url>
+  <url type="donation">https://github.com/sponsors/4gray</url>
+
+  <content_rating type="oars-1.0"/>
+
+  <screenshots>
+    <screenshot type="default">
+      <caption>Browse channels and watch live IPTV streams</caption>
+      <image type="source">https://4gray.github.io/iptvnator/appstream/player.png</image>
+    </screenshot>
+    <screenshot>
+      <caption>Manage playlists and switch between sources</caption>
+      <image type="source">https://4gray.github.io/iptvnator/appstream/playlists.png</image>
+    </screenshot>
+    <screenshot>
+      <caption>View programme schedules in the integrated EPG</caption>
+      <image type="source">https://4gray.github.io/iptvnator/appstream/epg.png</image>
+    </screenshot>
+    <screenshot>
+      <caption>Adjust playback, interface, and provider settings</caption>
+      <image type="source">https://4gray.github.io/iptvnator/appstream/settings.png</image>
+    </screenshot>
+  </screenshots>
+
+  <provides>
+    <binary>iptvnator</binary>
+  </provides>
+</component>
diff --git a/apps/website/public/appstream/epg.png b/apps/website/public/appstream/epg.png
new file mode 100644
index 000000000..5c7a857f3
Binary files /dev/null and b/apps/website/public/appstream/epg.png differ
diff --git a/apps/website/public/appstream/player.png b/apps/website/public/appstream/player.png
new file mode 100644
index 000000000..fa953d889
Binary files /dev/null and b/apps/website/public/appstream/player.png differ
diff --git a/apps/website/public/appstream/playlists.png b/apps/website/public/appstream/playlists.png
new file mode 100644
index 000000000..6fd4de312
Binary files /dev/null and b/apps/website/public/appstream/playlists.png differ
diff --git a/apps/website/public/appstream/settings.png b/apps/website/public/appstream/settings.png
new file mode 100644
index 000000000..e6a68a0dc
Binary files /dev/null and b/apps/website/public/appstream/settings.png differ
diff --git a/electron-builder.json b/electron-builder.json
index 32ba5457f..1c1faadc1 100644
--- a/electron-builder.json
+++ b/electron-builder.json
@@ -70,6 +70,15 @@
         "artifactName": "${name}-${version}-${os}-${arch}.${ext}",
         "icon": "apps/web/src/assets/icons"
     },
+    "flatpak": {
+        "branch": "stable",
+        "files": [
+            [
+                "apps/electron-backend/linux/com.fourgray.iptvnator.metainfo.xml",
+                "/share/metainfo/com.fourgray.iptvnator.metainfo.xml"
+            ]
+        ]
+    },
     "afterPack": "./tools/packaging/linux-after-pack.cjs",
     "snap": {
         "confinement": "strict",
diff --git a/tools/packaging/verify-electron-package-layout.mjs b/tools/packaging/verify-electron-package-layout.mjs
index 80f0295ac..830417751 100644
--- a/tools/packaging/verify-electron-package-layout.mjs
+++ b/tools/packaging/verify-electron-package-layout.mjs
@@ -16,6 +16,13 @@ const workspaceRoot = process.cwd();
 const executablesRoot = path.join(workspaceRoot, 'dist', 'executables');
 const packageJsonPath = path.join(workspaceRoot, 'package.json');
 const electronBuilderConfigPath = path.join(workspaceRoot, 'electron-builder.json');
+const flatpakMetainfoPath = path.join(
+    workspaceRoot,
+    'apps',
+    'electron-backend',
+    'linux',
+    'com.fourgray.iptvnator.metainfo.xml'
+);
 const packageMetadata = JSON.parse(fs.readFileSync(packageJsonPath, 'utf8'));
 const electronBuilderConfig = JSON.parse(
     fs.readFileSync(electronBuilderConfigPath, 'utf8')
@@ -197,6 +204,9 @@ function verifyResourceDir(resourceDir) {
     }
 
     if (platform === 'linux') {
+        if (!fileExists(flatpakMetainfoPath)) {
+            errors.push(`Missing Flatpak metainfo file: ${flatpakMetainfoPath}`);
+        }
         verifyLinuxLauncher(resourceDir, errors);
     }