The mark doesn't wash out.
It lives in the pixels, not metadata a screenshot would strip. Tested against the messy real world:
~99%
survives WhatsApp & iMessage recompression
~97%
survives screenshots
~99%
survives cropping
PrivateMark weaves an invisible, per-recipient watermark into every photo and document you share — so a leak names one person. And with Hidden Photo, you send a real picture disguised as an innocent cover only your trusted contact can open. All on-device — no servers, no accounts.
It lives in the pixels, not metadata a screenshot would strip. Tested against the messy real world: