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.
Unfortunately, we currently do not have a support on integrating Ecwid on JotForm. However, I can create a feature request on it and escalate this to our development team. I can't provide an expected date to when this will be implemented or even be considered, but rest assure that they are already aware on this.
For other app integration you can check this page and see if there's something similar that you can use: http://apps.jotform.com/.
I hope this helps.