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 create a report for your submissions and then share it so the submissions can be downloaded as well.
Here's the guide about reports: How-To-Create-Form-Reports-in-JotForm
If you want to allow the other person to view the form as well and make changes to it then you could set it up as a sub-user account, this way he could access to the submissions page, edit submissions and download them through reports too.
Here're some guides that will help you with this:
Hope this helps.