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JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
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Delete submissions automatically after a specified time limitAsked by prestwichac on May 19, 2014 at 12:09 PM
I forwarded this feature request to our developers' team. They will analyse its feasibility and contact you via this thread once they have an update on this.
Meanwhile you can try using a Google Spreadsheet Integration, that allows you to access and manage the submissions in a Spreadsheet:
Then you can use our Auto Delete Submissions app that deletes automatically any new submission.
This way all your submissions will be managed in the Google Spreadsheet, allowing you to create a date filter if you wish:
Let us know if further support is needed.