Grade.IQ vs Centered Cardboard
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Grade.IQ
Read full descriptionHide 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.
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.
- 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
Read full descriptionHide 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
Verdict
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
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.
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.
| Parameter | Grade.IQ | Centered Cardboard |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.8 (64 ratings) — better |
| Positive reviews | — | 66.7% of reviews |
| Number of ratings | — | 64 — better |
| Update frequency | Every 4 days — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.1 — better | 17.0 |
| Further details — not scored | ||
| Size | 50 MB | 22 MB |
| Age rating | 4+ | 4+ |
| Developer | MARCUS WILSON HUGHES | Oak Labs Limited Liability Company |
In-app purchases
Grade.IQ
- Grade Curious$2.991 Month
- Grade Enthusiast$5.991 Month
- Grade Obsessed$9.991 Month
Centered Cardboard
- Centered Cardboard Pro$9.99
Questions
Is Grade.IQ free?
Is Centered Cardboard free?
Do Grade.IQ or Centered Cardboard have ads?
Which is updated more often, Grade.IQ or Centered Cardboard?
Other comparisons















