JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
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.
When you create new forms in JotForm, I believe our back-end team have implemented the default theme to be mobile responsive.
If your form is still not mobile responsive/friendly, you can check our guide here on how to make your form mobile responsive: https://www.jotform.com/help/322-How-to-make-mobile-friendly-forms-on-JotForm
If you need help further assistance on specific fields, let us know and we'll be more than glad to help.