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.
I believe our appointment slots widget does exactly what you are looking for:
You can set up whatever type of appointments you would like and then set a value for the counter. If you set it to 1, then if someone selects that slot and completes a submission, that slot will no longer be available.
If you have any further questions or need any help getting this setup the way you would like, let us know and we will be happy to help.