About
This app helps trading card collectors measure card centering before grading. It uses your device's camera to analyze card corners and print alignment, providing centering percentages and estimated grading scores for major services. Save, share, and access card resources.
What's New in Caliper 卡牌居中检测
1.2
October 18, 2026
修复并完善了一些问题
Developer apps
FAQ
What is Caliper used for?
Caliper helps trading card collectors measure the centering of their cards before sending them for professional grading. It analyzes the alignment of the card's corners and printed image to provide centering percentages.
Does Caliper provide actual grading scores?
Caliper provides reference estimations for PSA, CGC, and BGS grading based on centering measurements. However, it explicitly states that centering is only one part of grading, and it does not guarantee final grading results.
How does Caliper handle user data and privacy?
Caliper processes photos and measurement results locally on the device. It only sends anonymous product interaction and diagnostic events, does not upload card images, require account registration, display ads, or track users across apps or websites.
What devices does Caliper support?
Caliper is supported on iPhone, iPad, and iPod devices. It was released on September 18, 2026, and the latest version is 1.2, updated on October 18, 2026.
Is Caliper free to use?
Yes, Caliper is available for free. The app does not have any in-app purchases or advertisements, making it entirely free for users.
What languages does Caliper support?
Caliper supports multiple languages, including English, Simplified Chinese, Japanese, Spanish, and Thai, making it accessible to a global audience of card collectors.
How accurate are Caliper's centering estimations?
Caliper calculates precise centering proportions for left/right and top/bottom alignment. While it offers reference estimations for grading services like PSA, CGC, and BGS, these are based solely on centering and do not account for other grading factors.
Does Caliper have ads?
No, Caliper does not display advertisements. The app is designed to be ad-free, ensuring a clean and uninterrupted user experience for measuring card centering.
