What we judged
- Finds the card edges and print frame automatically
- Lets you correct the lines by hand
- Shows the result against PSA, BGS and CGC standards
- Goes beyond centering (grade, price)
- Platforms and price
1. Midpoint: best for centering plus the full grade and price
Finds the outer edge and print frame, straightens the card and measures it, then estimates the whole grade and shows the raw and graded prices, so you can see if grading pays. iPhone, Android and web; a free web check needs no account.
iOS, Android, Web · 4.7 from 31 ratings (US App Store, 2026-10-14) · website
- Free: $0. All prices (raw and graded), price history and sold listings; 2 centering or grading analyses; 2 photo lookups; 3 Chat questions a day; free centering checker on the web (3 a day, no account).
- Weekly: $9.99/week. Unlimited centering, AI grading, photo lookup, bulk and scan-a-sheet, adding cards to your collection, unlimited Chat.
- 6 months: $49.99. Same as Weekly.
- Annual: $79.99/year. Same as Weekly.
2. Card Centering Calculator: best for a one-time-purchase iphone centering app
The most-rated centering-only app on the US App Store, with grades for six graders and a $4.99 one-time upgrade.
iOS · iOS 4.7 (2,489 ratings) · website · Midpoint vs Card Centering Calculator
- Free: $0 (with ads). Centering measurement.
- Premium: $4.99 one-time. No ads, real-time grades, higher scanner resolution (per the developer, January 2025).
3. CenterMint: best for careful line-by-line checks
Explains every line it is unsure about and shows border widths in millimetres; iPhone only.
iOS · iOS 5.0 (1 rating) · website · Midpoint vs CenterMint
- Free: $0 (with ads). Automatic centering, magnifier, manual line checks, history; small weekly batch and close-up limits.
- Pro: $2.99/month or $19.99/year. No ads, batches up to 50 photos, submission log, CSV export, 4K export.
4. Centering Lab: best for a free check that keeps the photo in your browser
No account, no upload, and it publishes its own accuracy test.
Web · website · Midpoint vs Centering Lab
- Free: $0, no account. Website tool, free REST API and MCP tools.
5. PriceCharting: best for a quick check next to a price guide
Its web calculator gives a centering grade estimate, though it needs clear borders and ignores corners and edges.
iOS, Android, Web · iOS 4.8 (27,183 ratings); Google Play 4.6 (8,873 ratings) · website
- Free account: $0. Price guide, collection tracker with value chart, marketplace with no fees, 1 import and export a week.
- Collector: $6/month or $59/year. Deal alerts, grading recommendations on every card, unlimited imports and exports.
- Legendary: $49/month. Price-list downloads, API, sales-volume reports.
Side by side
| Feature | Midpoint | Card Centering Calculator | CenterMint | Centering Lab | PriceCharting |
|---|---|---|---|---|---|
| Measures centering from a photo | Yesautomatic outer edge + print frame, 8 handles, ratios and mm | Yesautomatic or manual guides; six graders | Yesautomatic on raw cards; manual for sleeves and slabs | Yesengine proposes lines, you confirm; photo stays in the browser | Partlyweb calculator; centering only, needs clear borders |
| Estimates the grade (corners, edges, surface) | YesPSA, BGS, CGC and TAG estimates with subgrades | Nocentering only, by its own listing | Nocentering only, by its own FAQ | Nocentering ceilings only, by its own description | No |
| Graded prices (PSA, BGS, CGC…) | YesPSA, CGC, BGS, SGC, TAG by grade | Not stated | Not stated | Not stated | Yes |
| Identifies a card from a photo | Yes | Not stated | Not stated | Not stated | Yes |
| Bulk scanning | Yesup to 200 cards, or one photo of a whole binder page | Not stated | YesPro: up to 50 photos | Not stated | Not stated |
Questions
What centering do you need for a PSA 10?
About 55/45 or better on the front and 75/25 on the back, per PSA’s published standards. Midpoint’s grading-standards pages list every grader’s tolerances.
Is a centering app accurate enough to trust?
A good photo (flat card, straight-down shot, even light) gets within a point or two. Sleeves, glare and tilted photos throw every tool off, so photograph the bare card.
