You can use this app for quiz app, mock test app, etc. User can enter this app by choosing one of the options (Google login OR guest login). In guest login user data will not be saved online.
For database google spreadsheet is used, so no limitations like we get on airtable.
You can also check out my other apps or can buy my apps & extensions from AppDev: Aia & Extension store
Screenshots =
App download links = Google drive
Aia Price = ₹ 889 ($13)