Generate the iOS and Android smart app banner meta tags that prompt mobile visitors to open or install your app.
<!-- iOS Smart App Banner -->
<meta name="apple-itunes-app" content="app-id=123456789, app-argument=https://example.com">
<!-- Android Smart Banner (manual fallback) -->
<meta name="google-play-app" content="app-id=com.example.app">
<!-- Manifest deep-link entry -->
<link rel="manifest" href="/manifest.json">
<meta name="application-name" content="My App">