title: Speech Synthesis API isn't working in mobile browsers
body: <p>I'm trying to use the SpeechSynthesis API for my website, but it turns out that the same code that works on a desktop browser, doesn't work on a mobile browser. </p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;!DOCTYPE html&gt;
  &lt;html&gt;
  
  &lt;head&gt;
    &lt;title&gt;prueba&lt;/title&gt;
  &lt;/head&gt;
  
  &lt;body&gt;
    &lt;button onclick="play()"&gt;Play&lt;/button&gt;
    &lt;script&gt;
      function play() {
        if ('speechSynthesis' in window) {
          console.log("The API is installed");
          var ssu = new SpeechSynthesisUtterance("hello world");
          window.speechSynthesis.speak(ssu);
        }
      }
    &lt;/script&gt;
  &lt;/body&gt;
  
  &lt;/html&gt;</code></pre>
  </div>
  </div>
  </p>
  
  <p>I have tested it on a Huawei P10 with Chrome, iPhone X with Safari, and a Moto G5 with Chrome. None of these work. Does it work on your phones? Do you know how to fix it? Thank you.</p>
  
  <p><strong>UPDATE:</strong></p>
  
  <p>After deleting the history and cleaning cache, it works on Android devices. But it still doesn't work on iPhones (I've tested it on Iphone X and Iphone 6, before and after deleting the history and cache). </p>