ACE vs CenterMint
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/
CenterMint
Analyze the centering of trading cards from a single photo to determine their grading potential. It calculates border ratios and provides insights into whether a card is worth submitting for professional grading, with options for detailed analysis and submission tracking.
- Automatic centering measurement
- Border ratio calculation
- Grading standards comparison
- Worth Grading? profit calculator
- Submission log
- Corner and edge close-ups
- Line-by-line manual adjustment
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Is this card worth grading? Check its centering, corners and edges before you pay to find out. CenterMint measures the centering of raw trading cards and sports cards from a single photo. It finds the card's cut edge and printed border on all four sides, shows the left/right and top/bottom ratios, and tells you the best centering grade those ratios allow under common published standards (PSA, BGS, CGC and more). Works with raw standard-size cards such as Pokémon, One Piece, Magic: The Gathering and sports cards; smaller cards like Yu-Gi-Oh! can be measured too, but check the lines. NEW IN 1.11 • Border widths in mm or inches under every ratio (or off). The card size is detected from the photo, sports cards and the smaller Yu-Gi-Oh! size included. Free for everyone. • Corner & edge close-ups now sit right under your result, with thumbnails of all four corners. Free on 3 cards every week. • Free users get a batch of up to 5 photos every week. • A sharper, redrawn app icon. KEY TOOLS • Line-by-line check: when a photo needs a second look, CenterMint takes you to the line it's least sure about first, with the magnifier already in place. Tap "Looks Right" to move to the next one. • Know why: glare, blur, low light, low resolution, a mat that matches the card edge, or no printed border found. If a retake will fix it, it says so. • Worth Grading? (Pro): enter recent sold prices for the raw card, a 9 and a 10, plus the grading fee. See whether grading makes or loses money, and what a 10 has to sell for to break even. Grades the centering can't reach are left out. • Submission log (Pro): note what you sent and what it cost, add the grades when they come back, and see your top-grade rate and how the grades compare with the centering. FREE • Automatic centering for raw cards, a 1x–50x magnifier and manual line adjustment • Line-by-line check and retake tips • Front and back pairing, saved history with search, and share images • Border widths in mm or inches, close-ups on 3 cards every week, a batch of up to 5 photos every week, and Worth Grading? on one card The free version shows ads. CENTERMINT PRO No ads, Worth Grading?, corner & edge close-ups, submission log, a decision assistant that sorts your cards into submit / fix first / below target, batch scanning of up to 50 photos, submission checklist PDF, report images, 4K enhanced view and export, CSV export and saved presets. Choose a monthly or yearly subscription (yearly starts with a 1-week free trial); prices are shown in the app. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. Manage them in your Apple Account settings. WHAT IT DOESN'T DO • Automatic measurement is for raw cards only. For a card in a sleeve, top loader or graded slab, you line up the four edges yourself. When CenterMint detects a sleeve, it tells you and switches to manual alignment. • It measures centering only. It doesn't grade corners, edges or surface (the close-ups are for your own eyes), and it can't promise any grade. • Full-art and borderless cards may have no printed border, so their results are a reference. • Centering standards are references based on each company's published guidelines. CenterMint is an independent app and is not affiliated with PSA, Beckett (BGS), CGC or any grading company. It is not affiliated with any card publisher either; Pokémon, One Piece, Yu-Gi-Oh! and Magic: The Gathering are trademarks of their respective owners. Measurement runs on your device and needs no account. Sharing samples to improve detection is off by default. App languages: English, Japanese, Korean, Vietnamese, Simplified Chinese and Traditional Chinese. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://centermint.app/privacy
Screenshots
Verdict
The clearest difference is ads: ACE at none against CenterMint's shown. ACE also leads on update cadence (daily vs every 4 days) 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 CenterMint sells 2 in-app purchases, starting at $2.99 per month. 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 CenterMint. Both are backed by a comparable volume of ratings — 1 and 1 respectively.
ACE ships an update daily, CenterMint every 4 days. The most recent releases landed on October 15, 2026 and October 16, 2026 respectively.
| Parameter | ACE | CenterMint |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (1 ratings) |
| Number of ratings | 1 | 1 |
| Update frequency | Daily — better | Every 4 days |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.1 — better | 17.0 |
| Further details — not scored | ||
| Size | 41 MB | 52 MB |
| Age rating | 4+ | 4+ |
| Developer | Terror LLC | JIAPENG Zhao |
Customer experience
ACE
CenterMint
In-app purchases
ACE
- ace premium monthly$4.991 Month
CenterMint
- CenterMint Pro$2.991 Month
- CenterMint Pro$19.991 Year









