If by dependent dropdown you mean "Question B changes instantly based on the respondent's answer to Question A," Google Forms is limited. If you mean "keep dropdown choices aligned with a Google Sheets source list before people submit," FormRanger is a good fit.
People use "dependent dropdown" to describe two different workflows. One is respondent-time filtering, where a later question changes based on an earlier answer. The other is spreadsheet-backed choice management, where the form owner updates choices from Sheets before the form is used.
Google Forms does not natively filter a dropdown from Sheets during a respondent's live session based on a previous answer.
FormRanger can help keep dropdown, multiple-choice, and checkbox questions aligned with selected Google Sheets data.
Google Forms can route respondents to sections based on answers, but that is not the same as a filtered Sheets-backed dropdown.
If options represent inventory, payments, or booking slots, use a buffer or a purpose-built system instead of relying only on a form choice list.
Use FormRanger when your team has one source list in Google Sheets and wants Google Forms choices to reflect that list after a controlled update.
Consider separate form sections, separate forms, Apps Script, or a form builder designed for conditional logic.
Google Forms is not a transactional booking system. Add buffers, manual review, or a system that can reserve inventory.
Manual copy/paste may be enough if the list changes once a semester or once a year.
Use FormRanger when the source of truth belongs in Sheets and the form should be refreshed from that source.