Centering50 vs Trovie
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Centering50
This tool helps collectors accurately measure card centering for TCG and sports cards. It uses AI and precision tools to predict grades before submission, saving money on grading fees. Analyze both front and back for optimal results.
- Smart-Snap AI for fast scanning
- Auto-Straighten Technology
- Magenta Line Manual Mode
- Grading Standard Library comparison
- Front & Back Analysis
- 15x Precision Zoom
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Centering50: TCG & Sports Card Grading Tool Stop guessing and start grading with confidence. Whether you are a hardcore Pokémon TCG investor, a sports card flipper, or a casual collector, centering is the #1 reason cards fail to hit a Gem Mint 10. Centering50 is the professional-grade scanner designed to help you predict your grade before you spend a cent on submission fees. WHY CENTERING MATTERS In the modern hobby, the price gap between a PSA 9 and a PSA 10 can be thousands of dollars. Professional graders at PSA, BGS, SGC, CGC, and TAG use digital precision to measure border ratios. If your card is even 2% off, you lose the Gem Mint dream. Centering50 brings that same laboratory precision to your smartphone. PRECISION FEATURES FOR COLLECTORS: "Smart-Snap AI: Our algorithm helps you detect card borders for lightning-fast scanning of modern Pokémon, Magic: The Gathering (MTG), Lorcana, and One Piece cards. Save time with AI-assisted alignment, then fine-tune for 0.1% precision." Auto-Straighten Technology: Don't worry about perfect alignment. Scan at any angle and the app will instantly fix the tilt. The "Magenta Line" Manual Mode: For vintage cards or thick-bordered sports cards (Topps, Panini, Upper Deck), use our high-contrast measurement guides to set your own anchor points with 0.1% accuracy. Grading Standard Library: Instantly compare your results against the official 2026 standards: PSA: 55/45 Front (New 2025 Standard) BGS: 50/50 for Black Label eligibility SGC & CGC: Real-time centering thresholds Front & Back Analysis: Don't get rejected for a 90/10 back! Measure both sides independently to ensure your submission is truly "Perfect." 15x Precision Zoom: Perfectly align your guides on thin silver or gold borders with our enhanced magnification tool. SAVE MONEY ON SUBMISSION FEES Sending cards to be graded is expensive. Why pay for a "Near Mint 7" when you could have known the result at home? Use Centering50 to filter your collection and only send your strongest candidates. It’s the ultimate pre-grading utility for: Pokémon TCG (English & Japanese) Sports Cards (Basketball, Baseball, Football, Soccer) Disney Lorcana & One Piece TCG Yu-Gi-Oh! & Magic: The Gathering DESIGNED FOR THE 2026 HOBBYIST We know you’re scanning in different lighting. Our app features Dynamic Contrast Adjustment and Skew Correction, so even if your photo is slightly tilted, our math remains perfect. HOW TO USE: Place your card on a high-contrast, flat surface (no sleeves for best results). Take a photo directly from above. (with the green bubble in center) Align the Centering50 guides with the card edges and the internal art border. (Optionally: Unlock the image and move/resize/rotate) Get your LR (Left/Right) and TB (Top/Bottom) ratios instantly. JOIN THE 50/50 CLUB Centering50 isn't just a calculator; it’s your secret weapon in the grading game. Download now and take the guesswork out of your collection. Note: Centering50 provides a highly accurate estimate based on physical centering. Final grades are determined by professional grading companies based on additional factors like surface, corners, and edges. https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Trovie
This app streamlines inventory management and sales tracking for trading card game vendors. It automates cost basis calculations, tracks buys, sells, and trades, and provides event-specific financial summaries. Collectors can view live inventory via QR codes without needing an app.
- Automated cost basis calculation
- Unified buy, sell, and trade entry
- Barcode scanning for sealed products
- Event-specific financial scoreboards
- Multi-staff booth management
- Live inventory viewing for collectors
- Support for multiple TCGs
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The best part of the TCG hobby happens face to face. Trovie exists to protect that. The less time a vendor spends pricing cards and doing math, the more time everyone has for the conversation that brought them to the table in the first place. FOR VENDORS: LESS MATH, MORE TIME AT THE TABLE Most vendors know what a card sold for. Almost none know what they made on it. Writing down what you paid, card by card, is too slow to do at a buy counter, so it doesn't happen. Trovie fixes that. - Set it once: set your buy percentage and every card you scan in gets a cost basis automatically. Know something the market doesn't? Override any number by hand. - Every deal, one screen: buys, sells, and trades with cash added in all use the same entry. Nothing to reconcile later. - Sealed, slabs, and singles: boxes, bundles, and ETBs scan by barcode. Raw cards and slabs are identified instantly. - Know what the show actually made you: every event gets its own scoreboard: cost, margin, cards in, cards out. - Run it with your crew: invite the people working your booth. Everyone sees the same live inventory, and a multi-table setup can run several shows at once, one per staffer. FOR COLLECTORS: WALK UP AND SEE WHAT'S THERE (Patent Pending) No more flipping through every binder to find out what a vendor has. Scan the QR code at their table and their live inventory opens right on your phone. No app, no login, nothing to install to browse. Build a list as you go and hand it over ready to check out. It's a starting point for the conversation, not a hold on the card, so nothing is ever reserved or claimed out from under anyone. --- EIGHT GAMES AND COUNTING. Trovie covers the major trading card games collectors and vendors actually deal in (English and Japanese editions included) with new sets and new games added constantly. WHAT TROVIE ISN'T. Not a register or POS replacement. Not a marketplace, and Trovie never takes a cut of a sale. This is the back office for the table that's already happening, not a new place to run it from. Built by people in this hobby, for the hobby. Less time on admin, more time with the person across the table.
Screenshots
Verdict
Centering50 and Trovie both sit at 4.7 stars, but that hides the real split: 92% of Trovie's written reviews are positive against 50% of Centering50's. Trovie also leads on in-app purchases (none vs 3) and ads (none vs shown). On price, rating, ratings volume 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
Both are free to download. Centering50 sells 3 in-app purchases, starting at $4.99 per month. Trovie asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.7 for Centering50 against 4.8 for Trovie. Both are backed by a comparable volume of ratings — 54 and 20 respectively. Written reviews are what separate them: 50% of Centering50's written reviews are positive against 92% of Trovie's.
Centering50 ships an update every 8 days, Trovie weekly. The most recent releases landed on November 9, 2026 and November 5, 2026 respectively.
| Parameter | Centering50 | Trovie |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (54 ratings) | 4.8 (20 ratings) — better |
| Positive reviews | 50.0% of reviews | 91.7% of reviews — better |
| Number of ratings | 54 — better | 20 |
| Update frequency | Every 8 days | Weekly — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 16.2 — better | 17.0 |
| Further details — not scored | ||
| Size | 155 MB | 95 MB |
| Age rating | 17+ | 4+ |
| Developer | FUK WAI LI | Trovie, Inc. |
Customer experience
Centering50
Trovie
In-app purchases
Centering50
- Unlimited Monthly$4.991 Month
- Unlimited Yearly$24.991 Year
- Full Version Lifetime Access$49.99
Trovie
No in-app purchases









