Comparison

Card Grading AI vs Centered Cardboard

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Card Grading AI

Estimate the grade of your trading cards using AI analysis of photos. Catalog your collection, track its value, and explore market trends. Supports various TCG and sports cards.

Highlights
  • AI card grading estimation
  • Subgrade analysis (centering, corners, edges, surface)
  • Digital portfolio and catalog
  • Estimated collection value tracking
  • TCG and sports card catalog
  • Market trend discovery
Features
Read full description

Estimate your card's grade before you submit it for professional grading. Photograph the front and back to review centering, corners, edges and surface with Card Grading AI. AI GRADING & CENTERING • Get an estimated grade with all four subgrades. • Check border alignment with the dedicated centering tool. • Revisit your grading history and digital slabs. YOUR PORTFOLIO & CARD CATALOG • Build your collection and follow its estimated value using available market prices. • Browse supported cards and sets in the TCG catalog. • Track the cards you own and find the ones you still need. MORE TO EXPLORE Discover Top Singles, Best to Grade and Top Sealed lists for ideas to research. Check the update dates shown in the app when reviewing these lists. FOR TCG & SPORTS CARD COLLECTORS Use CGA with Pokémon, sports cards, Magic: The Gathering, Yu-Gi-Oh! and Disney Lorcana. Catalog coverage and available prices vary by card and set. FREE DOWNLOAD & OPTIONAL UPGRADES Some features require an in-app purchase. See the app for available plans and included features. ABOUT AI ESTIMATES Results are estimates based on your photos, not authentication or official certification. Lighting, glare, sleeves and hidden defects can affect the result. Professional grades may differ. CGA is independent and is not affiliated with professional grading companies or the owners of the card brands mentioned. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Centered Cardboard

This app helps trading card collectors pre-grade their cards by analyzing centering and alignment. It uses your device's camera and visual tools to provide quick, consistent, and accurate feedback on card position and border spacing.

Highlights
  • Live centering feedback with color-coded indicators
  • Skewed measuring for rotated borders
  • Exact distances for border spacing
  • Gyro leveling crosshair
  • Outline guide overlays
  • Up to 100x zoom
  • Camera capture or photo import
Features
Read full description

Centered Cardboard helps you pre-grade trading cards by making centering, alignment, and corner assessment quick, consistent, and easy to understand. Use your camera or import photos to examine cards with clear visual tools designed for accuracy: • Live centering feedback with color-coded ratios • Grading score estimates based on leading grading-company standards • Corner Grading for recording all four front and back corners • Tilted Measuring for cards with rotated inner borders • True Distance measurements for exact border spacing • Adjustable outline guides for accurate card alignment • Gyro crosshair and calibration tools for level camera positioning • Photo filters that improve edge visibility in difficult lighting • Up to 100× zoom for precise positioning and fine adjustments • Camera, Photos, and Files image support • Separate or combined front and back scores • Side-by-side exports for sharing both sides in one image • Cardboard History for saving, searching, editing, and revisiting exports locally • One-tap sharing for quickly saving or sending results Centered Cardboard gives collectors a clear, repeatable way to inspect cards before submitting them for grading. Centered Cardboard is an independent tool and is not affiliated with or endorsed by any card-grading company. Results are estimates and do not guarantee an official grade.

Screenshots

Card Grading AI4 screens
Centered Cardboard4 screens

Verdict

The call

The clearest difference is ads: Centered Cardboard at none against Card Grading AI's shown. Card Grading AI's advantage is ratings volume (615 vs 60) and iOS requirement (15.0 vs 17.0). On price, rating, review sentiment and update cadence there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Card Grading AI sells 6 in-app purchases, starting at $9.99 per month and Centered Cardboard sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.8 for Card Grading AI against 4.9 for Centered Cardboard. That said, the two scores are not equally well evidenced: Card Grading AI has 615 ratings behind it against 60, so its average is the more settled of the two. Written reviews are what separate them: 93% of Card Grading AI's written reviews are positive against 100% of Centered Cardboard's.

UpkeepUpdate frequency

Card Grading AI ships an update every 10 days, Centered Cardboard every 3 weeks. Both last shipped on October 31, 2026.

Scorecard3 real differences · 7 level
Card Grading AI versus Centered Cardboard: the parameters behind the verdict, then further details
ParameterCard Grading AICentered Cardboard
PriceFreeFree
Rating4.8 (615 ratings)4.9 (60 ratings) — better
Positive reviews93.1% of reviews100.0% of reviews — better
Number of ratings615 — better60
Update frequencyEvery 10 days — betterEvery 3 weeks
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better17.0
Further details — not scored
Size74 MB18 MB
Age rating+44+
DeveloperMatteo GiannessiOak Labs Limited Liability Company

Customer experience

Card Grading AI

All ratings615 ratings
Positive96.4%
Neutral2.0%
Negative1.6%
Written reviews130 reviews
Positive93.1%
Neutral2.3%
Negative4.6%

Centered Cardboard

All ratings40 ratings
Positive97.5%
Neutral2.5%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

6 purchases

Card Grading AI

Subscriptions2
  • Unlimited Plan$9.991 Month
  • Card Grading AI yearly plan$59.991 Year
One-time4
  • Unlimited Plan$19.99
  • Pro Plan upgrade$39.99
  • Pro plan$49.99
Show 1 more
  • CGA Lifetime plan$149.99
1 purchases

Centered Cardboard

One-time1
  • Centered Cardboard Pro$4.99

Questions

Is Card Grading AI free?
Card Grading AI is free to download, with in-app purchases available.
Is Centered Cardboard free?
Centered Cardboard is free to download, with in-app purchases available.
Which has better reviews, Card Grading AI or Centered Cardboard?
Centered Cardboard is rated higher. Card Grading AI averages 4.8 out of 5 from 615 ratings, while Centered Cardboard averages 4.9 from 60 ratings.
Do Card Grading AI or Centered Cardboard have ads?
Card Grading AI shows ads; Centered Cardboard does not.
Which is updated more often, Card Grading AI or Centered Cardboard?
Card Grading AI ships an update every 10 days, and Centered Cardboard every 3 weeks. Most recently, Card Grading AI was updated on October 31, 2026 and Centered Cardboard on October 31, 2026.

Other comparisons