Reply To: Export InDesign File both as spreads and single pages at the same time?

But then your client would have two separate PDF files!

You can also send them some basic instructions. The Adobe Acrobat Reader allows changing the view to Single page and to Double page. If you want to start the double-page view with a single odd page, set “Two up (Cover page)” as the default view option; then, a reader can still change it to “Single page” if he wants.