What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
I have checked your form and I have seen that you do not use our Mobile Responsive Widget in order to make it mobile friendly.
You can add the "Mobile Responsive Widget" into your form as you can find at the following link: https://widgets.jotform.com/widget/mobile_responsive
Please try this and the issue still persists on iPhone, let us know.
That worked. Thanks!