Comparison

Grade.IQ 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

Grade.IQ

Read full description

Grade.IQ uses advanced AI to analyse your Pokémon cards and estimate professional grades before you submit — saving you time and money. PHOTO-BASED GRADING Simply photograph your card and our AI analyses centring, corners, edges, and surface condition to give you an estimated grade in seconds. MULTIPLE GRADING STANDARDS Get estimated grades for PSA, Beckett (BGS), ACE Grading, CGC, and TAG — built around each company's published standards, all in one scan. CLAHE ENHANCEMENT FILTERS Grade.IQ doesn't just look at your photo. It applies professional CLAHE imaging filters (adaptive histogram equalisation) to reveal micro-scratches, edge whitening, and surface texture invisible to the naked eye — for a sharper, more accurate grade. REAL MARKET VALUES See actual eBay sold prices for graded copies of your card, so you know exactly what it's worth at every grade level — and which company gives you the best return. TCG ADVISOR Chat with your own AI card expert for instant answers on values, grades, deals, and whether a card is worth submitting. DEEP GRADE MODE Capture up to 16 photos including close-ups of all 4 corners for the most accurate AI assessment possible. BULK GRADING Grade up to 20 cards at once — perfect for sorting through a collection quickly. CROSSOVER GRADING Already own a graded slab? Estimate how it could score with a different grading company before you cross it over. JAPANESE CARD SUPPORT Full support for Japanese sets with Cardmarket EU pricing. Whether you're a collector, trader, or serious grader, Grade.IQ gives you the edge before your cards go in the post. BUILT BY THE COMMUNITY, FOR THE COMMUNITY I'm a solo developer and a collector just like you — and this is the very first app I've ever built. I made Grade.IQ for our community because it's something I wanted myself. As a one-person team you may run into the odd bug, but I'm fully committed to fixing them quickly and making the app better with every update. Your feedback means everything — thank you for giving Grade.IQ a try.

About

Centered Cardboard

This app assists trading card collectors in pre-grading their cards. It uses your device's camera and clear visual tools to assess centering, alignment, and corners, providing estimated grading scores based on industry standards. Save, export, and share your card assessments easily.

Highlights
  • Live centering feedback with color-coded ratios
  • Grading score estimates
  • Corner grading for all four corners
  • Tilted measuring for rotated borders
  • True distance measurements
  • Adjustable outline guides
  • Up to 100x zoom
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

Grade.IQ4 screens
Centered Cardboard4 screens

Verdict

The call

The clearest difference is update cadence: Grade.IQ at every 4 days against Centered Cardboard's every 3 weeks. Grade.IQ also leads on iOS requirement (15.1 vs 17.0). On price, ads, in-app purchases and device support 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. Grade.IQ sells 3 in-app purchases, starting at $2.99 per month and Centered Cardboard sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Grade.IQ ships an update every 4 days, Centered Cardboard every 3 weeks. The most recent releases landed on November 9, 2026 and November 11, 2026 respectively.

Scorecard2 real differences · 8 level
Grade.IQ versus Centered Cardboard: the parameters behind the verdict, then further details
ParameterGrade.IQCentered Cardboard
PriceFreeFree
Rating—4.8 (64 ratings) — better
Positive reviews—66.7% of reviews
Number of ratings—64 — better
Update frequencyEvery 4 days — betterEvery 3 weeks
AdsNoNo
In-app purchasesYesYes
Monetization—Free with in-app purchases
DevicesiPhone, iPodiPhone, iPad
Requires iOS15.1 — better17.0
Further details — not scored
Size50 MB22 MB
Age rating4+4+
DeveloperMARCUS WILSON HUGHESOak Labs Limited Liability Company

In-app purchases

3 purchases

Grade.IQ

Subscriptions3
  • Grade Curious$2.991 Month
  • Grade Enthusiast$5.991 Month
  • Grade Obsessed$9.991 Month
1 purchases

Centered Cardboard

One-time1
  • Centered Cardboard Pro$9.99

Questions

Is Grade.IQ free?
Grade.IQ is free to download, with in-app purchases available.
Is Centered Cardboard free?
Centered Cardboard is free to download, with in-app purchases available.
Do Grade.IQ or Centered Cardboard have ads?
Neither Grade.IQ nor Centered Cardboard shows ads.
Which is updated more often, Grade.IQ or Centered Cardboard?
Grade.IQ ships an update every 4 days, and Centered Cardboard every 3 weeks. Most recently, Grade.IQ was updated on November 9, 2026 and Centered Cardboard on November 11, 2026.

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