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.
When you created a form using the Form Builder, it is mobile responsive by default. In the Form Designer, please click the "Preview form" button in order to check what the form will look like in different devices.
In the Preview, you'll see the devices button at the top right.
You may also need to enable the "Make this form responsive" in the Form Designer.
Please check this related guide: https://www.jotform.com/help/322-How-to-make-mobile-friendly-forms-on-JotForm
Hope that helps. Thank you.