Is there a automatic deletion of submission feature?

Is it possible to setup JotForm to automatically delete form submissions after a certain number, instead of having to go in and do it manually every time?

You can use the "Autodelete Submissions app". What it does is, it auto delete submissions right away after a user successfully submitted the form.

App: https://apps.jotform.com/app/auto_delete_submissions

Let us know if that could work for you.