Centerin
Card Centering Tool
Measure card centering with your camera, with an honest ± range. On-device only.
Get it on Google PlayFeatures
- Shooting guide that checks the card, the background and the size
- Measure from a photo in your gallery
- Front and back
- Manual line adjustment with a magnifier
- History (up to 5 in the free version)
- 7 languages: English, Japanese, Korean, Chinese (Traditional and Simplified), Spanish, Portuguese
An honest ± range, on your phone
- Results look like "54/46 ±1": the ratio plus the uncertainty that photo can support. If the range is too wide, the app asks you to shoot again.
- The app shows whether a card is within, near the edge of, or outside PSA®'s published guideline for a 10 (front about 55/45, back 75/25). CGC, BGS and TAG values are listed with sources and the date they were checked.
- All measuring happens on the device. No account, no ads, no analytics.
Centerin Pro (one-time purchase): unlimited history, export history as CSV, and a net proceeds calculator. It does not estimate which outcome is likely.
Get it on Google PlayThe inner frame of Japanese Pokémon cards (silver border) is detected automatically. Other standard-size cards (63 × 88 mm), such as ONE PIECE cards, are supported with manual checking.
This is not a grade or a prediction. Graders also look at corners, edges and surface. Centerin is not affiliated with or endorsed by PSA®, CGC, BGS, TAG, ARS or any other grading company. PSA® is a registered trademark of its owner.