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.
We have a couple of widgets that you can use if you are looking on how to dynamically add a "other" field or duplicating an input field to have multiple answers. You can check this page for that list: http://widgets.jotform.com/category/multiple_entries
Here are personal choices that I would suggest, these are the common widgets that are being used for this kind of entries:
To use the widget, you can visit the links above and click "Get Now", or you can use the Widget section in the form builder and search for its name:
I hope this helps. Do let us know if you need more assistance on this.