client.html

<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="utf-8" />
  <meta name="apple-mobile-web-app-capable" />
  <script>
    window.onload = function () {
      if (/iPhone|iPad|iPod/i.test(navigator.userAgent)) {
        window.location = "https://stage-api.centuriongame.in/user/static/apple-app-site-association"; // Your app's URL to open the app and then pageID to open specific page.
        setTimeout(function () {
          window.location.href =
            "https://apps.apple.com/in/app/facebook/id284882215"; //'YOUR_APP_STORE_LINK';
        }, 5000);
      } else {
        // Android
        console.log("android")
      }

    };
  </script>
</head>

<body>
  <img src="../assets/yourAppIcon.png" style="width: 35%; border-radius: 15%; margin-left: 34%; margin-top: 48%"
    alt="" />
  <br />
  <a href="https://apps.apple.com/in/app/facebook/id284882215" style="
        display: inline-block;
        overflow: hidden;
        width: 65%;
        background-image: url('../assets/icon.svg');
        background-repeat: no-repeat;
        height: 111px;
        background-size: contain;
        margin-left: 32%;
        margin-top: 26%;
      "></a>
</body>

</html>