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.
Yes, that is possible, there's two methods that you can use:
Method 1: Use the Auto Fill feature.
Method 2: Using the email as a session ID, here's a guide: http://www.jotform.com/help/97-How-to-Save-Forms-to-Continue-Later?
I prefer using method 2, it gives your users the option to continue filling out the form on any computer, as long as they have the session URL with their email address as mentioned in the guide above. Method 1 only stores the progress on the actual browser and it may load previous sessions of other users if they are using the same computer and browser.
Do let us know if you need more information on this.