Doesn't work on iPad

First, I LOVE the scroll triggered box, it’s really great. The PHP code helped make sure it shows on my android mobile phone. I’m having a problem though, it isn’t showing up at all on my iPad Mini.

Here is the code I’m using:

<div style="background-color: #FFFFFF"> <form id="sendForm" action="http://login.konig.co/fbAPI" method="post" target="_blank" ><table cellspacing="5" cellpadding="0" style="font-family:helvetica, sans-serif"><tbody><tr><td style="color:#ff0000">*</td><td style="font-size:14px;color:#000000">Mobile Number:</td><td><input type="text" id="mN" name="mN" style="width:185px"></td></tr><tr><td></td><td style="font-size:14px;color:#000000">First Name:</td><td><input type="text" id="first" name="first" style="width:185px"></td></tr><tr><td></td><td style="font-size:14px;color:#000000">Last Name:</td><td><input type="text" id="last" name="last" style="width:185px"></td></tr><tr><td></td><td style="font-size:14px;color:#000000">Zip Code:</td><td><input type="text" id="zip" name="zip" style="width:185px"></td></tr></tbody></table><table cellspacing="15" cellpadding="0" style="font-family:helvetica, sans-serif"><tbody><tr><td width="285px" style="text-align:center"><input type="submit" id="submitButton" value="Send"></td></tr></tbody></table><table cellspacing="5" cellpadding="0" style="font-family:helvetica, sans-serif"><tbody><tr><td colspan="3" style="font-size:small">Standard text & data rates apply.<br>You are not opting in to ongoing marketing.<br>You will receive a special offer by text message<br>with a link to your digital coupon.<br>You will receive a phone call to confirm receipt<br>of your digital coupon.</td></tr><tr><td style="text-align:center"><a href="http://login.konig.co/info/terms.jsf" style="font-size:12px;color:#000000">Terms of Service</a> | <a href="http://login.konig.co/info/privacyPolicy.jsf" style="font-size:12px;color:#000000">Privacy Policy</a></td></tr></tbody></table><input type="hidden" id="sc" name="sc" value="weblead (76626)" /><input type="hidden" id="ev" name="ev" value="send" /><input type="hidden" id="ac" name="ac" value="0" /><input type="hidden" id="me" name="me" value="WebSite" /><input type="hidden" id="forwardLink" name="forwardLink" value="http://konig.co/team" /></form></div>

https://wordpress.org/plugins/scroll-triggered-boxes/