# Proof Authentication vs MintySlab® | Card Centering

The clearest difference is in-app purchases: Proof Authentication at none against MintySlab® | Card Centering's 2. Proof Authentication also leads on ads (none vs shown) and iOS requirement (14.4 vs 17.0). MintySlab® | Card Centering's advantage is review sentiment (83% vs 50%) and update cadence (weekly vs every 2 months). On price, rating, ratings volume and device support there is nothing between them.

Both are free to download. MintySlab® | Card Centering sells 2 in-app purchases, starting at $4.99 per month. Proof Authentication asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.4 for Proof Authentication against 4.6 for MintySlab® | Card Centering. Both are backed by a comparable volume of ratings — 7 and 9 respectively. Written reviews are what separate them: 50% of Proof Authentication's written reviews are positive against 83% of MintySlab® | Card Centering's.

Proof Authentication ships an update every 2 months, MintySlab® | Card Centering weekly. The most recent releases landed on September 24, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Proof Authentication | MintySlab® | Card Centering |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (7 ratings)](https://appshunter.io/ios/app/proof-authentication/id1589988080/reviews) | **[4.6 (9 ratings)](https://appshunter.io/ios/app/mintyslab-card-centering/id6605924591/reviews)** |
| Number of ratings | 7 | **9** |
| Positive reviews | 50.0% of reviews | **83.3% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 76 MB | 46 MB |
| Requires iOS | **14.4** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Proof Authentication Corporation](https://appshunter.io/developer/1604240795) | [Peryer Technologies LLC](https://appshunter.io/developer/1760990425) |

## What reviewers say

### Proof Authentication

[App page](https://appshunter.io/ios/app/proof-authentication/id1589988080)

Verify product authenticity instantly by scanning official security marks. Ensure your purchases are genuine with rapid and accurate authentication. Look for the Proof Security Mark on select consumer goods.

**Highlights:** Instant product authentication, Scan Official Proof Security Marks, High accuracy verification, Fast results, Supports selected consumer items

**In-app purchases:** none


### MintySlab® | Card Centering

[App page](https://appshunter.io/ios/app/mintyslab-card-centering/id6605924591)

This app uses advanced computer vision to analyze the centering of sports and TCG trading cards. Get instant, accurate centering results to inform grading decisions and prepare cards for submission.

**Highlights:** Precision card centering analysis, Instant centering breakdown, Grade preparation confidence, Scan from camera roll, Scan from online listings, Evaluate before purchase

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MintySlab+ (Monthly) | $4.99 | per month |
| MintySlab+ (Annual) | $29.99 | per year |


## Frequently asked questions

### Is Proof Authentication free?

Proof Authentication is free to download, with no in-app purchases.

### Is MintySlab® | Card Centering free?

MintySlab® | Card Centering is free to download, with in-app purchases available.

### Which has better reviews, Proof Authentication or MintySlab® | Card Centering?

MintySlab® | Card Centering is rated higher. Proof Authentication averages 4.4 out of 5 from 7 ratings, while MintySlab® | Card Centering averages 4.6 from 9 ratings.

### Do Proof Authentication or MintySlab® | Card Centering have ads?

MintySlab® | Card Centering shows ads; Proof Authentication does not.

### Which is updated more often, Proof Authentication or MintySlab® | Card Centering?

Proof Authentication ships an update every 2 months, and MintySlab® | Card Centering weekly. Most recently, Proof Authentication was updated on September 24, 2026 and MintySlab® | Card Centering on September 30, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*