<p>When your BPM goes out limit BPM, you get sound alert.</p><p><b>Warning!</b> This app can run in the background, but your phone may kill it. How to prevent this read here: <a href="https://dontkillmyapp.com/" target="_blank" rel="noindex nofollow noopener">dontkillmyapp.com</a>.</p><p><b>Supported devices:</b></p><ul><li>Polar H10</li><li>Polar H9</li><li>Polar H7</li><li>Polar OH1</li><li>Polar Verity Sense</li></ul>