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.
There's two ways on how to make your form mobile responsive.
Method 1: You can enable the mobile responsive options by following this guide: http://www.jotform.com/help/311-How-to-make-Forms-Mobile-Responsive.
Method 2: You can add the Mobile responsive widget. Here's a guide on how to add a widget: http://www.jotform.com/help/252-How-to-Add-a-Widget-to-your-Form
If that doesn't work, let us know the link to your website where the form is embedded and we will check it out.