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.
JotForm forms can be completed as long as it is viewed on a web browser. For mobile phones, it can be completed on a mobile web browser, in the case of iPhone it should work on Safari.
If what you meant is embedding the form on a mobile app, then it depends on where and how the form is embedded. If it does not load or cannot be submitted using a mobile app, then it's possible that there are resources or scripts that are not being loaded or are being blocked by your mobile app.
I hope that helps.