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.
Mobile responsive widget is added in form to ensure that fields of your form are displayed correctly in mobile devices. It will adjust the width of your form and fields based on the width of mobile device.
Please note that you can also enable mobile responsive property of in your form "Form Designer": https://www.jotform.com/help/311-How-to-make-forms-mobile-responsive
Hope this helps.
Do get back to us if you have any questions.