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Quick summary
Card Centering Calculator is a free iPhone app that helps collectors and graders evaluate how centered trading and sports cards are. It measures centering ratios in real time and presents results in an easy-to-understand format so you can judge how centering may affect a card’s grade and market value.
Cards it supports
- Sports cards (baseball, basketball, football, etc.)
- Magic: The Gathering and other TCGs
- Yu-Gi-Oh! cards
- Pokémon cards
Key tools and features
- Visual preview tools that make off-center margins easy to spot
- Step-by-step manual guides for users who prefer hands-on measurement
- AI-driven scanner with automatic edge detection for fast, consistent readings
- Instant centering ratio readouts for both the front and back of a card
How it helps with grading
The app compares measured centering ratios against common grading thresholds, showing likely outcomes from major grading services such as PSA, BGS, and CGC. It highlights differences between front- and back-side standards so you can anticipate how each side might influence an overall grade.
Who this is best for
This tool is useful for collectors preparing submissions, sellers verifying condition before listing, and buyers checking expected grade before purchase. It’s also valuable for anyone who wants a clearer sense of how centering impacts a card’s final grade and resale value.
Recommended alternative
- AppValley — free option with different feature offerings
Technical
- iPhone
- Free
