Comparison

OPTCG Deck Builder vs Card Centering Calculator

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

Head to head
About

OPTCG Deck Builder

This app helps One Piece Trading Card Game players build and organize their decks. It features a searchable card database, an intuitive deck editor, and helpful deck statistics to improve strategy and consistency. New card sets are regularly added to keep your decks up-to-date.

Highlights
  • Searchable card database
  • Intuitive deck editor
  • Deck statistics (color balance, curve)
  • Regularly updated card sets
  • Deck organization and planning
Features
Read full description

OP Deck Builder is an unofficial companion app made to help One Piece Trading Card Game players build decks faster, stay organized, and plan better before every match. Browse an ever-growing card database and quickly find what you need using simple filters like color, cost, type, and rarity. Build your deck with a clean, easy-to-use editor that keeps the focus on strategy. Review helpful deck stats such as color balance and curve to improve consistency and performance. New booster and starter sets are added as they release, so your decks always stay up to date. Whether you’re getting ready for a local tournament, trying new ideas, or managing your collection, OP TCG Deck Builder is a reliable tool for planning and organizing your One Piece TCG decks. --- Disclaimer: This is an unofficial, fan-made app and is not affiliated with, sponsored by, or endorsed by Bandai, Eiichirō Oda, or any official One Piece entities. This app does not include gameplay; it is a tool for organizing and planning physical One Piece Trading Card Game decks. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://opdeckbuilder.com/privacy.html

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.

Screenshots

OPTCG Deck Builder4 screens
Card Centering Calculator4 screens

Verdict

The call

The clearest difference is ratings volume: Card Centering Calculator at 2.6K against OPTCG Deck Builder's 72. OPTCG Deck Builder's advantage is iOS requirement (15.0 vs 18.0). 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. OPTCG Deck Builder sells 4 in-app purchases, starting at $0.99 per 7 days and Card Centering Calculator sells 5 one-off in-app purchases. 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 — 4.6 for OPTCG Deck Builder against 4.7 for Card Centering Calculator. That said, the two scores are not equally well evidenced: Card Centering Calculator has 2.6K ratings behind it against 72, so its average is the more settled of the two. Written reviews split almost evenly too, at 59% and 60% positive.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on November 7, 2026 and November 4, 2026 respectively.

Scorecard2 real differences · 8 level
OPTCG Deck Builder versus Card Centering Calculator: the parameters behind the verdict, then further details
ParameterOPTCG Deck BuilderCard Centering Calculator
PriceFreeFree
Rating4.6 (72 ratings)4.7 (2.6K ratings) — better
Positive reviews59.3% of reviews60.0% of reviews — better
Number of ratings722.6K — better
Update frequencyMonthlyMonthly
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better18.0
Further details — not scored
Size59 MB21 MB
Age rating4+4+
DeveloperLeonardo Ivan Quintero VegaJade Lizard Software LLC

Customer experience

OPTCG Deck Builder

All ratings72 ratings
Positive88.9%
Neutral2.8%
Negative8.3%
Written reviews27 reviews
Positive59.3%
Neutral14.8%
Negative25.9%

Card Centering Calculator

All ratings2,459 ratings
Positive93.4%
Neutral1.2%
Negative5.4%
Written reviews135 reviews
Positive60.0%
Neutral2.2%
Negative37.8%

Bugs and requests

OPTCG Deck Builder

Not enough reviews yet to summarise bugs or 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

In-app purchases

4 purchases

OPTCG Deck Builder

Subscriptions3
  • DeckBuilder Pro$0.997 Days
  • DeckBuilder Pro$3.991 Month
  • DeckBuilder Pro$29.991 Year
One-time1
  • Banish Ads$3.49
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

Questions

Is OPTCG Deck Builder free?
OPTCG Deck Builder is free to download, with in-app purchases available.
Is Card Centering Calculator free?
Card Centering Calculator is free to download, with in-app purchases available.
Which has better reviews, OPTCG Deck Builder or Card Centering Calculator?
Card Centering Calculator is rated higher. OPTCG Deck Builder averages 4.6 out of 5 from 72 ratings, while Card Centering Calculator averages 4.7 from 2.6K ratings.
Do OPTCG Deck Builder or Card Centering Calculator have ads?
Both OPTCG Deck Builder and Card Centering Calculator show ads.
Which is updated more often, OPTCG Deck Builder or Card Centering Calculator?
OPTCG Deck Builder ships an update monthly, and Card Centering Calculator monthly. Most recently, OPTCG Deck Builder was updated on November 7, 2026 and Card Centering Calculator on November 4, 2026.

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