Privacy, plainly.
Calculator inputs belong to your game state - not to this site.
What OPTCGTools does and does not collect
The calculators on OPTCGTools run in your browser. Board state, counter estimates, deck counts, and form entries are not sent to an OPTCGTools application server, stored in an OPTCGTools database, or attached to an account. The site has no sign-in and no advertising or analytics scripts in this release.
Normal web hosting
Like any website, the hosting provider may process standard technical request data needed to deliver pages, such as IP address, requested URL, browser type, and time of request. This is governed by the host's own service terms and controls. OPTCGTools does not use calculator inputs to build player profiles.
External links
The Rules & Method page links to the official ONE PIECE Card Game rules. When you follow an external link, that site has its own privacy practices.
Changes
If this site later adds a contact form, analytics, cookies, saved states, or an account system, this page must be updated before those features go live. Until then, the meaningful privacy choice is simple: calculations remain local.