ACE vs CenterGrade App
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ACE
This app uses AI to analyze your One Piece Trading Card Game cards, providing detailed pre-grade estimates with subgrades for centering, corners, edges, and surface. It automatically identifies cards and compares them to reference images, offering a convenient way to assess your collection's condition.
- AI-powered card grading
- Detailed grade reports with subgrades
- Automatic card identification
- Reference image comparison
- Batch grading for multiple cards
- Shareable grade reports
- Scan history tracking
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Ace uses advanced AI to analyze your One Piece Trading Card Game cards and deliver detailed pre-grade estimates — right from your phone. HOW IT WORKS 1. Photograph the front and back of your card 2. Ace's AI identifies your card and matches it against a reference catalog 3. Receive a detailed grade report with subgrades for centering, corners, edges, and surface DETAILED GRADING Every scan produces a comprehensive report modeled after professional grading standards. Each card receives an overall grade (1-10) along with individual subgrades and confidence scores. The AI examines your card for whitening, centering shifts, corner wear, edge damage, and surface defects — on both the front and back. CARD IDENTIFICATION Ace automatically identifies your card by reading the card number and matching it against a catalog of One Piece TCG cards. It even distinguishes between regular art, alternate art, and parallel variants using visual comparison. REFERENCE COMPARISON When your card is identified, Ace fetches a pristine reference image and uses it as a baseline during grading — the same way a professional grader would compare against a known standard. BATCH GRADING Grade multiple cards in a single session with batch scanning. Photograph each card, add it to your queue, and submit them all at once. Track progress as each card is graded. SHARE YOUR RESULTS Generate a styled grade report image and share it directly to social media, messaging apps, or anywhere else using the native share sheet. SCAN HISTORY All your past scans are saved so you can revisit grades and track your collection's condition over time. FREE & PREMIUM Start grading for free with a daily scan limit. Upgrade to Premium for unlimited scans, batch grading, and priority processing. IMPORTANT DISCLAIMER Ace provides AI-powered pre-grade estimates only. Results may differ from official grading services such as PSA, BGS, or CGC. Do not use Ace to guarantee or predict grades from professional grading companies. Link to Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
CenterGrade App
This app uses AI to analyze card centering and predict grading outcomes for multiple companies. It also provides real-time market data and ROI calculations to help collectors make informed decisions before submitting cards for grading.
- AI centering analysis
- Grade predictions for 6 companies
- Real-time card values
- ROI calculator
- Market Pulse liquidity scores
- On-device processing
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Stop guessing whether your card will hit a PSA 10. Start knowing — and know exactly what it's worth. CenterGrade is the only app that combines AI-powered centering analysis with real-time market intelligence. Measure centering, predict grades for 6 grading companies, check live card values, and calculate your return on investment — all before you spend a dime on grading fees. No subscription. No daily scan limits. No data leaving your phone. MARKET INTELLIGENCE — KNOW BEFORE YOU GRADE This changes everything. Search any trading card and instantly see real-time estimated values, interactive price history graphs, and Market Pulse liquidity scores. Market Pulse tells you whether a card is actually selling — not just listed. Investors and collectors finally have the data they need to make smart decisions. ROI CALCULATOR — MAXIMIZE EVERY SUBMISSION CenterGrade calculates your projected return for every grading company based on your predicted centering grades and current market prices. See exactly which grader gives you the highest profit margin. Stop submitting cards to the wrong company. HOW CENTERING ANALYSIS WORKS Point your camera at any trading card — or screenshot one from eBay, an auction listing, or anywhere. AI detects the outer card edge and inner border automatically, calculates left/right and top/bottom centering ratios, and delivers instant grade predictions. Takes about 5 seconds. Most centering apps fall apart on dark borders, holographic surfaces, and vintage stock. CenterGrade was built for exactly these cases. Cards on wood, granite, fabric, and other textured surfaces are detected reliably. A built-in leveling guide and auto-capture eliminate angle errors. SIX GRADING COMPANIES. ONE SCAN. See predictions for PSA, BGS, CGC, SGC, ACE, and TAG all at once. PSA and BGS predictions are always free. CGC, SGC, ACE, and TAG unlock with Pro. FRONT AND BACK — THE WAY PSA GRADES Scan the front, flip the card, scan the back. Both measurements factor into your predictions. Stop losing Gem Mints to a back centering problem you didn't know about. PRECISION TOOLS Center any card no matter how bad the photo. Drag pins to fine-tune borders. Pinch to zoom up to 15x. Screenshot card photos on ebay and center them before you invest. Undo and redo up to 20 steps. Ratios update live. FEATURES - Real-time card values and price history (Pro) - ROI calculator for every grading company (Pro) - Market Pulse liquidity scores — know if cards are selling (Pro) - AI border detection — dark borders, foil, holo, vintage - Instant preview — cards appear immediately, no loading - L/R and T/B centering ratios with overall score (0-100) - PSA and BGS predictions (free), CGC/SGC/ACE/TAG (Pro) - Front + back scanning as a linked pair - Collection manager with portfolio tracking - HD capture, 15x zoom, fine adjustment (Pro) - Shareable result cards - 100% on-device centering — images never leave your phone GO PRO — $4.99 ONE-TIME - Market Intelligence with live card values - ROI calculator and projected returns - Market Pulse liquidity scores - Price history graphs - All 6 grading company predictions - Unlimited collection - Ad-free experience - HD capture, 15x zoom, fine adjustment - Guide color and line thickness picker One price. Yours forever. No recurring charges. If CenterGrade saves you from even one bad submission, it pays for itself many times over. Works with Pokemon, baseball, basketball, football, hockey, One Piece, MTG, Yu-Gi-Oh!, Lorcana, and any card with borders. Privacy: https://centergradeapp.com/privacy Terms: https://centergradeapp.com/terms
Screenshots
Verdict
The clearest difference is ads: ACE at none against CenterGrade App's shown. ACE also leads on update cadence (daily vs every 4 weeks) and iOS requirement (15.1 vs 17.0). On price, rating, ratings volume and in-app purchases 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. ACE sells 1 in-app purchase, starting at $4.99 per month and CenterGrade App sells 5 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 5.0 for ACE against 5.0 for CenterGrade App. Both are backed by a comparable volume of ratings — 1 and 2 respectively.
ACE ships an update daily, CenterGrade App every 4 weeks. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.
| Parameter | ACE | CenterGrade App |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (2 ratings) |
| Number of ratings | 1 | 2 — better |
| Update frequency | Daily — better | Every 4 weeks |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | Free with in-app purchases |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 15.1 — better | 17.0 |
| Further details — not scored | ||
| Size | 41 MB | 19 MB |
| Age rating | 4+ | 4+ |
| Developer | Terror LLC | Gabin Williams |
In-app purchases
ACE
- ace premium monthly$4.991 Month
CenterGrade App
- Coffee Tip$0.99
- Lunch Tip$2.99
- CenterGrade App Pro$4.99
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- Dinner Tip$4.99
- Pack Tip$9.99









