The short answer
Both have a free browser check. Pick Centering Lab if you want centering only and want the photo to stay in your browser. Pick Midpoint if you then want the grade estimated and the card priced, or want a native iPhone or Android app.
Choose Centering Lab if
- You want the photo to stay on your device
- You want a free API for your own tools
- You only need centering ceilings
Choose Midpoint if
- You want a grade estimate, not just centering
- You want raw and graded prices for the card
- You want native apps and a saved collection
Feature by feature
| Feature | Midpoint | Centering Lab |
|---|---|---|
| Measures centering from a photo | Yesautomatic outer edge + print frame, 8 handles, ratios and mm | Yesengine proposes lines, you confirm; photo stays in the browser |
| Estimates the grade (corners, edges, surface) | YesPSA, BGS, CGC and TAG estimates with subgrades | Nocentering ceilings only, by its own description |
| Identifies a card from a photo | Yes | Not stated |
| Reads graded slab labels | YesPSA, BGS, CGC, TAG | Not stated |
| Raw (ungraded) market prices | Yes | Not stated |
| Graded prices (PSA, BGS, CGC…) | YesPSA, CGC, BGS, SGC, TAG by grade | Not stated |
| Price history charts | Yes | Not stated |
| Price alerts | Yespush + email | Not stated |
| Collection value tracking | Yes | Not stated |
| Bulk scanning | Yesup to 200 cards, or one photo of a whole binder page | Not stated |
| CSV export | Yes | Not stated |
| Buy and sell inside the app | Nolinks out to live eBay listings | Not stated |
| Community / forum | Yes | Not stated |
“Not stated” means none of Centering Lab’s official pages we checked describe the feature either way.
What each costs
Centering Lab
- Free: $0, no account. Website tool, free REST API and MCP tools.
Midpoint
- 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.
Where Centering Lab is strong
- Free, no account, and the photo never leaves your browser
- Publishes its own accuracy test and a dated change log
- Free API and MCP server
Switching to Midpoint
Nothing to move.
Questions
Is Midpoint’s centering check free?
Yes: cardcenteringtool.com/centering-calculator checks 3 cards a day with no account, using Midpoint’s own detection model.
