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.
You can make the form mobile responsive by following this guide: https://www.jotform.com/help/322-How-to-make-mobile-friendly-forms-on-JotForm.
Below is a quick step-by-step that you can follow:
1. In your V4 form builder, click the "Form Designer" button.
2. Scroll down and you should see the "Advanced Designer" button:
3. That will open the full Form Designer Tool, from there you can enable the mobile responsive option or use custom CSS code to make it responsive.
I hope that helps.