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.
I would always suggest to use web form for mobile devices instead of Fillable PDFs. I believe that whole Mac community is having trouble with this - not only with jotform Fillable PDFs, but all dynamic/active PDFs in general and I presume that there is no app for mobile devices that would allow the PDFs to be saved at all.
You might be able to print the page with the entered values as PDF if the mobile browser offers you that ability though.