A SureSheet is a spreadsheet that always "resets" when it's reloaded. When you share a SureSheet, recipients can edit it, but their changes are not saved. Reloading the SureSheet will always reset it to what was originally shared.
The benefit of EqualTo SureSheet compared to e.g. Google Sheets, is that you can share or embed spreadsheets that won't change or break over time.
Here are some sample SureSheets: Tesla running cost calculator, Investment growth calculator.
Upload a workbook (.xlsx)
How do I share SureSheet?