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.
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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.
Since you never provided any further details, I'll just cite our guide on how to make forms mobile responsive.
Complete guide: How-to-make-forms-mobile-responsive
Just give that a spin and let us know if you'd need further help.