Pop-up as a confirmation after clicking submit button?

Is there a way a pop-up can appear when the user clicks "Submit" that asks if they want to submit? (As a confirmation or double check)

Unfortunately, we do not have a pop-up of some kind after clicking the submit button.

But we do have the Preview Before Submit widget. Please do try it out, it allows your users to preview their answers first before actually submitting the form.

To add a widget on your form, you can follow this guide: https://www.jotform.com/help/252-How-to-Add-a-Widget-to-your-Form 

Let us know if you need further assistance on this.