How do I turn on pon for Siri?

The first time, tell Siri „Add to pon“. Siri then asks whether you want to turn on pon for Siri — confirm it. Only after that does Siri respond to pon's phrases. Other phrases, such as „Add something to pon“, do not trigger this question.

On Apple Watch, Siri asks once too: say „Add to pon“ there the first time and confirm.

If Siri later asks whether you mean pon, Notes or Reminders, choose pon.