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.
You could be referring to 2 things also when you say combining the forms... the form fields or the submission data.
The 2 JotForm Apps below does this separately.
#1. Combine form's fields and create a new form using JotForm Field Manager App
#2. Combine form's submission data using the JotForm Combine Submissions App.
Hope this help. Let us know how we can be of further assistance.