# MintGauge: Centering ± Meter — Every reading with its ± error

> Every reading with its ± error (iPhone/iPad app by Revolution Sport Company Limited.)

- Source: https://appshunter.io/ios/app/mintgauge-centering-meter/id6828684675 (this page in markdown: same URL + `.md`)
- Developer: [Revolution Sport Company Limited](https://appshunter.io/developer/1019368534)
- Category: Utilities, Sports
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 16.0 · 49 MB
- Languages: American English, Japanese
- Released: 2026-11-05
- Data updated: 2026-11-08

## What is MintGauge?

Is that card centered well enough to be worth grading? MintGauge measures it before you pay to find out.

Hold your phone over a card. MintGauge finds the card, takes 10 frames and reports the median left/right and top/bottom ratios, with the uncertainty of the reading. If an edge is unclear, it tells you so and lets you set it by hand instead of guessing.

MEASURE
• Front and back, unlimited, free
• Automatic card detection with a 10-frame median
• Every result shows its ± uncertainty and whether the reading was stable
• Works from the camera or from a photo you already have
• Raw cards, penny sleeves and top loaders

FIX ANY EDGE BY HAND, ALWAYS FREE
• Drag any of the eight edges, or nudge it one pixel at a time
• A magnifier for exact placement
• Manual adjustment is never behind a paywall

SEE WHERE YOU STAND
• L/R and T/B ratios, plus the larger-first form used for thresholds (for example 55/45)
• An estimated max grade for centering, compared with the published centering standards of PSA, BGS, CGC and SGC. For example, PSA allows up to 55/45 on the front and 75/25 on the back for a PSA 10.
• Where a grader publishes no number, MintGauge uses a commonly cited community value and labels it "≈ community standard". Grades with no reliable source are not shown.

KEEP AND SHARE
• History of your measured cards, front and back
• A clean share card with the ratios and the estimate

HONEST BY DESIGN
• No ads. No account. No sign-up.
• Card photos are processed on your phone and never uploaded by MintGauge. The app sends a photo nowhere unless you share it.

IMPORTANT
MintGauge estimates centering only. It is not a grade: grading companies also judge corners, edges and surface, and decide the final grade themselves. MintGauge is not affiliated with, endorsed by or sponsored by PSA, Beckett (BGS), CGC, SGC or any other grading company. Their names are used only to refer to their published standards.

MINTGAUGE PRO
Free covers measuring, manual adjustment, the magnifier and the max-grade estimate for all four graders, with your 20 most recent cards in History. Pro adds:
• Unlimited History and folders
• CSV and PDF export for submissions
• Share cards without the watermark
• Custom grading thresholds

Pro is available as:
• Monthly: $2.99 per month, auto-renewing
• Yearly: $19.99 per year, auto-renewing, with a 3-day free trial
• Lifetime: $49.99, a one-time purchase that unlocks all current Pro tools
Prices are in US dollars; your store shows the price for your country.

Payment is charged to your Apple Account when you confirm the purchase, or when the free trial ends. A subscription renews automatically at the same price unless auto-renew is turned off at least 24 hours before the end of the current period; your account is charged for the renewal within 24 hours before the period ends. Cancel the free trial at least 24 hours before it ends and you will not be charged. Manage or cancel in Settings > [your name] > Subscriptions. Refunds are handled by Apple.

Terms of Use: https://mintgauge.app/terms
Privacy Policy: https://mintgauge.app/privacy
Support: support@mintgauge.app

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| MintGauge Pro Yearly | $19.99 | per year |
| MintGauge Pro Monthly | $2.99 | per month |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| MintGauge Pro Lifetime | $49.99 | one-time |


## Is MintGauge safe?

Not enough ratings yet to assess MintGauge.

## Is MintGauge legit?

MintGauge: Centering ± Meter appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for MintGauge is 75 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 1 release)

### 1.0.0 — 2026-11-05

No release notes.

## More apps by Revolution Sport Company Limited

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- [TODO Widget](https://appshunter.io/ios/app/todo-widget/id6450088685)

All apps by Revolution Sport Company Limited: https://appshunter.io/developer/1019368534

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-11-08.*