Private — nothing you write is saved, here or anywhere. On this hosted demo your words are sent to Google’s endpoint to be answered; the local path keeps them on your device. Nothing about what you wrote is ever shown to anyone else.
Give them a link. All they will ever see is whether you checked in — never what you wrote, never how bad it got, and never whether you slipped.
Steady is a support tool, not treatment and not a crisis service. In immediate danger, contact local emergency services, or find a verified line at findahelpline.com.