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 wasn't sure to which form you're referring to. But you can try to insert the Mobile responsive widget.
Since Mobile Responsive widget is not yet included in our V4 builder, you'll have to switch to V3 include it, and then you can switch back to V4.
You can follow this guide:
Let us know if you need further assistance.