Show your palm.
Four lines and the shape of the hand.
Photograph your open palm in daylight and the lines are read from the picture itself — the life line, the head line, the heart line, where they cross and where they break. The photo is shrunk and stripped of its metadata before it is stored, kept for 30 days, and then deleted.
Right palm, open hand, daylight, no shadow across the palm. Fill the frame.
By uploading you confirm this is your own hand and no face is in the frame. The photo is kept for 30 days.
Photos of faces are refused. Face data is biometric, and we do not take it — not for reading, not for storage.
What gets read
The lines and mounts of the open hand, and what they do relative to each other. Not your face, not your age, not your health.
What happens to the photo
It is rotated, shrunk to 1280 px and re-encoded on arrival, which drops the EXIF block — the location and the phone model go with it. The original is never written to disk. What is kept is deleted after 30 days by a job, not by intention.