FormCrafts has a Google spreadsheet add-on which allows you to record incoming form responses into a Google sheet in real-time.

To enable the addon, on your form edit screen go to Addons → General and enable Google Spreadsheet. Next you will be prompted to give permissions to FormCrafts to edit your spreadsheet(s). Once that is done you would be able to give you spreadsheet a name.

Please note that you can't connect your form to an existing spreadsheet. FormCrafts will create an appropriate spreadsheet for you.

Enabling Google Sheets in FormCrafts