The plotter runs in your browser. Saved protocols live in localStorage on this device under steroidplotter.protocols.v1. We do not have accounts, cookies for tracking, or a database of your protocols in v1.
Share links encode the protocol in the URL query string. Anyone with the link can see those numbers. Do not put identifying information in a protocol name if you share the URL.
Hosting is on Vercel, which receives normal request logs. That is not the same as storing your chart.