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, it is necesary to add a sub-account if you want him/her to have access to check your submissions or edit your forms.
While adding a sub-account you can choose share all of your forms or only selected forms, also you can give him/her access to check your submissions, only edit your forms or both if you prefer.
Otherwise the another account can clone your forms but these won't be synchronized with yours. In other words the cloned form will be another form.
I hope this helps.
If need further assistance, do let us know.