Moonitor Notifications vs Card Centering Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Moonitor Notifications
Receive important Discord notifications directly on your mobile device. This app bridges the gap between your Discord groups and your phone, ensuring you never miss critical updates. If your Discord group isn't yet supported, encourage your admins to reach out for integration.
- Discord notification transfer
- Mobile alerts
- Group notification support
- Admin integration requests
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Transfer notifications from your selected groups on discord straight to your phone. Is your group not supported by Moonitor Notifications? Tell your admins to contact us to implement Moonitor Notifications.
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.
- 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
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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
Verdict
The clearest difference is review sentiment: Card Centering Calculator at 60% against Moonitor Notifications's 17%. Card Centering Calculator also leads on rating (4.7 vs 2.5) and update cadence (monthly vs every 5 months). Moonitor Notifications's advantage is in-app purchases (none vs 5) and ads (none vs shown). On price 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
Both are free to download. Card Centering Calculator sells 5 one-off in-app purchases. Moonitor Notifications asks for nothing beyond the download.
Card Centering Calculator holds the better App Store score, 4.7 against 2.5. That said, the two scores are not equally well evidenced: Card Centering Calculator has 2.6K ratings behind it against 59, so its average is the more settled of the two. Written reviews point the same way: 17% of Moonitor Notifications's written reviews are positive against 60% of Card Centering Calculator's.
Moonitor Notifications ships an update every 5 months, Card Centering Calculator monthly. The most recent releases landed on October 24, 2026 and October 30, 2026 respectively.
| Parameter | Moonitor Notifications | Card Centering Calculator |
|---|---|---|
| Price | Free | Free |
| Rating | 2.5 (59 ratings) | 4.7 (2.6K ratings) — better |
| Positive reviews | 16.7% of reviews | 60.0% of reviews — better |
| Number of ratings | 59 | 2.6K — better |
| Update frequency | Every 5 months | Monthly — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 12.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 26 MB | 21 MB |
| Age rating | 4+ | 4+ |
| Developer | Ziv Cohen | Jade Lizard Software LLC |
Customer experience
Moonitor Notifications
Card Centering Calculator
Bugs and requests
Moonitor Notifications
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
Moonitor Notifications
No in-app purchases
Card Centering Calculator
- Small Tip$0.99
- Medium Tip$1.99
- Unlock Premium$4.99
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- Large Tip$4.99
- Pristine Tip$9.99
Questions
Is Moonitor Notifications free?
Is Card Centering Calculator free?
Which has better reviews, Moonitor Notifications or Card Centering Calculator?
Do Moonitor Notifications or Card Centering Calculator have ads?
Which is updated more often, Moonitor Notifications or Card Centering Calculator?
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