Publisher and product transparency
About Is My Card Centered?
Is My Card Centered? is designed, built, and maintained under the public creator identity super_pjj. That is the consistent publisher identity used across this site. The publisher is responsible for the tool code, editorial pages, release notes, corrections, and the decision to keep these tools independent from grading companies, card manufacturers, and marketplaces.
The tools were created to turn several easy-to-rush collector tasks into repeatable workflows: placing centering boundaries, separating checked from unchecked condition areas, comparing population counts without treating a gem rate as a prediction, and documenting uncertainty before money is spent on grading.
Is My Card Centered? is an independent software project, not a grading service or a professional-grader credential. The work is presented through inspectable methods, visible controls, documented limitations, and reproducible software checks—not an unsupported accuracy claim.
Affiliate links and independence
As an Amazon Associate I earn from qualifying purchases. Some educational guides include clearly marked, optional links to example supplies on Amazon. These links do not affect tool calculations, Pre-Screen, AI Review, or submit-or-hold guidance, and they do not mean Amazon endorses this site.
What is original to this product
The Centering tool implements a manual guide geometry model, four-corner perspective workspace, three-point uneven-border sampling, visual edge aids, and centering-only reference bands. Its exact calculation is documented in the Centering Methodology.
Pre-Screen encodes a front/back evidence sequence for photo setup, centering, corners, edges, surface, and skipped checks. Gem Finder transforms imported PSA population records into searchable grade breakdowns, volume bands, and gem-rate context while retaining a link to the PSA source page. Card Review provides a separate AI-assisted analysis path.
Deterministic tools versus AI-assisted review
Deterministic
Centering ratios and the Manual Calculator use explicit inputs and formulas. The same saved coordinates or border values produce the same arithmetic result. Human guide placement and photo quality remain sources of variation.
AI-assisted
Card Review interprets submitted photos and user-entered evidence with an AI model. Its output can vary, can miss or misread defects, and must be treated as an informational second pass rather than a deterministic measurement, authentication, or grade.
How feature changes are tested
The integrated codebase has automated tests for centering calculations and interactions, static content and route behavior, Gem Finder data/UI behavior, and Card Review grading, storage, and API behavior. Release candidates are also built and checked at the root and app level.
- root unit and integration tests plus the production static build
- Card Review typecheck, tests, and production Next.js build
- Gem Finder tests and production Vite build
- browser workflow checks for Centering, Pre-Screen, and public routes
- desktop and mobile review for navigation, workflow controls, rendered content, and ad-space regressions
Passing software tests does not prove grading accuracy. It shows that the implemented behavior remains internally consistent. Claims about real-world accuracy require a separate, documented validation study; no such percentage is claimed.
How limitations and uncertainty are handled
Tools use estimate, evidence, and confidence language instead of guaranteed-grade language. Missing photos and skipped observations should remain visibly incomplete. Centering-grade labels are centering-only references. Population and public PSA 10 comp context are separated from the condition of the card in hand, retain source links where available, and remain subject to a documented monetized-reuse review.
Uploaded card images are not automatically promoted into public reference imagery. Centering's completed logs are metadata-only. Card Review uses an image-backed workflow for review and reopening as described in the Privacy Policy; that is separate from publishing an image on an editorial or research page.
Corrections, evidence, and feedback
Send a broken-link report, standards correction, reproducible bug, data-source concern, or accessibility problem to hello@ismycardcentered.com or use the Contact page. Helpful reports include the page URL, device/browser, what you expected, what happened, and a screenshot that does not expose information you do not want reviewed.
Material product changes are summarized in Release Notes. Time-sensitive grading-company references are linked to their current official source wherever they are used.