Every submission you collect is yours. Formspark lets you take all of it out again, on every plan, including the free one.
Pick the submissions you want in the dashboard and download them as CSV or JSON straight away.
Need a longer stretch of history? Queue an export for any period you like, and download the file once it is ready.
CSV opens in a spreadsheet. JSON goes straight into your own tooling.
Check out the documentation for more information.