Comparison

Card Centering Calculator vs SlabDEX

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

Head to head
About

Card Centering Calculator

This app helps collectors and traders measure card centering ratios for grading. It uses AI to detect centering or allows manual adjustments for precise measurements, displaying potential grades from major companies.

Highlights
  • AI-powered card centering detection
  • Manual centering measurement with zoom
  • Grade comparisons for PSA, BGS, SGC, CGC, TAG, ACE
  • Front and back side centering measurement
  • Grading standards reference guide
  • Off-center visualization tool
Features
Read full description

Card Centering Calculator is the ultimate tool for measuring your card's centering ratios before grading. Whether you collect Pokémon, One Piece, Lorcana, Yu-Gi-Oh!, Magic, baseball, basketball, football, or other trading and sports cards, the app helps you quickly measure centering, compare grading standards, and decide if your card may be worth submitting. Scan or upload a card image to calculate real-time centering ratios, such as 55/45 or 60/40, and instantly compare the highest potential centering grades from major grading companies including PSA, BGS, SGC, CGC, TAG, and ACE. Wondering if your card has centering worthy of a Gem Mint 10? Measure it before you submit. --- Card Scanner With Auto Centering Detection --- Scan or upload your card and let the app automatically detect the card edges and calculate centering ratios. --- Precise Ratio Measurements --- Manually adjust measurement guides on each side of the card for precise centering calculations. Use zoom for ultra-accurate adjustments and fine-tuning. --- Measure in Pixels, Millimeters, or Inches --- Switch from percentages to real measurements. View each border's width in pixels, millimeters, or inches to double-check against calipers or calculate centering your own way. --- Saved Cards --- Save cards to your collection and come back to them later. Add tags, filter your saved cards, and keep track of cards you may want to grade, sell, trade, or review again. --- Perspective Fix Tool --- Correct skewed, angled, bent, or warped card images before measuring. The Perspective Fix tool helps straighten card edges so you can get cleaner and more accurate centering measurements. --- Grade Comparisons --- Instantly see the best possible centering grades from PSA, BGS, CGC, SGC, TAG, and ACE as you adjust your card's ratios. Compare grading companies and see how each company's centering standards may affect your card. --- Front and Back Side Grading --- Measure centering for both the front and back of your card, since grading standards differ between sides. --- Pokémon e-Reader Card Mode --- Measure Expedition, Aquapolis, and Skyridge e-Reader cards correctly. The dot-code strip makes the left and bottom borders wider by design, so e-Reader mode compares the top and right borders the way graders do and saves the setting with each card. --- Grading Standards Reference --- View centering standards from PSA, BGS, CGC, SGC, TAG, and ACE in one convenient reference section. --- Cropping and Image Tools --- Crop card images, upload from your photo library, scan with the camera, or upload a card image from a URL. --- Compatible With All Cards --- Use Card Centering Calculator with TCG cards, sports cards, and other collectible cards, including Pokémon, One Piece, Yu-Gi-Oh!, Lorcana, Magic: The Gathering, baseball, basketball, football, and more. Why Centering Matters: Centering plays a major role in determining a card's grade from professional grading companies. Even if a card is otherwise in excellent condition, poor centering can reduce its grade and impact its value. Card Centering Calculator helps you measure centering ratios before submitting cards for grading, giving you more information when deciding which cards to grade, sell, trade, or keep raw. Note: Card Centering Calculator focuses on measuring centering ratios. Professional grading companies such as PSA, BGS, CGC, SGC, TAG, and ACE also evaluate other factors, including corners, edges, surface wear, scratches, dents, print quality, and overall condition. This app does not assess those additional grading criteria.

About

SlabDEX

Easily identify, price, and track your Pokémon card collection. Scan raw, graded, and sealed cards to view market data and compare prices. Organize your entire collection in one convenient dashboard.

Highlights
  • Scan raw, graded, and sealed cards
  • View recent sold listings and market values
  • Compare prices across different grades
  • Track personal collection and portfolio value
  • Organize cards, slabs, and sealed products
  • Access premium tools for advanced collectors
Features
Read full description

SlabDEX is a Pokémon trading card scanner and collection manager built for collectors who want a faster way to identify cards, check market data, and keep their collection organized. Scan raw, graded, and sealed cards, review recent sold listings, compare prices across grades, and track your collection value from one clean mobile dashboard. SlabDEX helps make collecting easier by bringing card identification, pricing, and portfolio tracking into one place. Features include: • Scan raw, graded, and sealed trading cards • View recent sold comps and estimated market values • Compare graded values with Grade Ladder • Track your personal collection and portfolio value • Organize cards, slabs, and sealed products • Review scan results before adding items to your collection • Access premium tools for advanced collectors SlabDEX is designed for collectors who want a simple, organized way to manage their cards without digging through multiple websites or spreadsheets. SlabDEX offers an auto-renewable subscription. Payment is charged to your Apple ID at confirmation of purchase. The subscription renews automatically unless canceled at least 24 hours before the end of the current period. Manage or cancel in your App Store account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://slabdex.net/privacy

Screenshots

Card Centering Calculator4 screens
SlabDEX4 screens

Verdict

The call

The clearest difference is review sentiment: SlabDEX at 100% against Card Centering Calculator's 60%. SlabDEX also leads on ads (none vs shown) and rating (5.0 vs 4.7). Card Centering Calculator's advantage is monetization model (free with in-app purchases vs subscription) and ratings volume (2.5K vs 4). On price, 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. Card Centering Calculator sells 5 one-off in-app purchases and SlabDEX sells 5 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

SlabDEX holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Card Centering Calculator has 2.5K ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 60% of Card Centering Calculator's written reviews are positive against 100% of SlabDEX's.

UpkeepUpdate frequency

Card Centering Calculator ships an update monthly, SlabDEX weekly. The most recent releases landed on October 24, 2026 and October 7, 2026 respectively.

Scorecard7 real differences · 3 level
Card Centering Calculator versus SlabDEX: the parameters behind the verdict, then further details
ParameterCard Centering CalculatorSlabDEX
PriceFreeFree
Rating4.7 (2.5K ratings)5.0 (4 ratings) — better
Positive reviews60.3% of reviews100.0% of reviews — better
Number of ratings2.5K — better4
Update frequencyMonthlyWeekly — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchases — betterSubscription
DevicesiPhone, iPadiPhone, iPad
Requires iOS18.016.6 — better
Further details — not scored
Size21 MB94 MB
Age rating4+4+
DeveloperJade Lizard Software LLCSOMNIARE LLC

Customer experience

Card Centering Calculator

All ratings2,459 ratings
Positive93.4%
Neutral1.2%
Negative5.4%
Written reviews131 reviews
Positive60.3%
Neutral2.3%
Negative37.4%

SlabDEX

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Card Centering Calculator

Reported bugs

2 issues
  • Centering measurement resets during use
  • Image rotation doesn't stay in place

Requested features

2 requests
  • Thinner and dashed centering lines for better visibility
  • Free access to grading information without subscription

SlabDEX

Not enough reviews yet to summarise bugs or requests.

In-app purchases

5 purchases

Card Centering Calculator

One-time5
  • Small Tip$0.99
  • Medium Tip$1.99
  • Unlock Premium$4.99
Show 2 more
  • Large Tip$4.99
  • Pristine Tip$9.99
5 purchases

SlabDEX

Subscriptions4
  • SlabDEX Collector Monthly7 Days trial$7.991 Month
  • DEX Pro Monthly$14.991 Month
  • SlabDEX Collector Yearly7 Days trial$49.991 Year
Show 1 more
  • DEX Pro Yearly$119.991 Year
One-time1
  • SlabDEX 5 AI Grade Credits$4.99

Questions

Is Card Centering Calculator free?
Card Centering Calculator is free to download, with in-app purchases available.
Is SlabDEX free?
SlabDEX is free to download, with in-app purchases available.
Which has better reviews, Card Centering Calculator or SlabDEX?
SlabDEX is rated higher. Card Centering Calculator averages 4.7 out of 5 from 2.5K ratings, while SlabDEX averages 5.0 from 4 ratings.
Do Card Centering Calculator or SlabDEX have ads?
Card Centering Calculator shows ads; SlabDEX does not.
Which is updated more often, Card Centering Calculator or SlabDEX?
Card Centering Calculator ships an update monthly, and SlabDEX weekly. Most recently, Card Centering Calculator was updated on October 24, 2026 and SlabDEX on October 7, 2026.

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