# Proof Authentication vs Ding Detect

The clearest difference is review sentiment: Ding Detect at 100% against Proof Authentication's 50%. Ding Detect also leads on rating (5.0 vs 4.4) and update cadence (every 2 weeks vs every 2 months). Proof Authentication's advantage is in-app purchases (none vs 1) and ratings volume (7 vs 2). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Ding Detect sells 1 one-off in-app purchase. Proof Authentication asks for nothing beyond the download.

Ding Detect holds the better App Store score, 5.0 against 4.4. Both are backed by a comparable volume of ratings — 7 and 2 respectively. Written reviews point the same way: 50% of Proof Authentication's written reviews are positive against 100% of Ding Detect's.

Proof Authentication ships an update every 2 months, Ding Detect every 2 weeks. The most recent releases landed on September 8, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Proof Authentication | Ding Detect |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (7 ratings)](https://appshunter.io/ios/app/proof-authentication/id1589988080/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/ding-detect/id6773055856/reviews)** |
| Number of ratings | **7** | 2 |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | **Free** | Freemium |
| Size | 76 MB | 66 MB |
| Requires iOS | **14.4** | 15.5 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Proof Authentication Corporation](https://appshunter.io/developer/1604240795) | [Techcave, LLC](https://appshunter.io/developer/907191026) |

## 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


### Ding Detect

[App page](https://appshunter.io/ios/app/ding-detect/id6773055856)

Instantly measure the centering of trading cards using your phone. Get estimated grade tiers from major grading companies and track your collection strategy. Export and share your results.

**Highlights:** Centering analysis for front and back, Grade predictions for major companies, Customizable guide controls, Scan history tracking, Dashboard performance stats, Export and share results

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Card Centering Tool | $3.99 | one-time |


## Frequently asked questions

### Is Proof Authentication free?

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

### Is Ding Detect free?

Ding Detect is free to download, with in-app purchases available.

### Which has better reviews, Proof Authentication or Ding Detect?

Ding Detect is rated higher. Proof Authentication averages 4.4 out of 5 from 7 ratings, while Ding Detect averages 5.0 from 2 ratings.

### Do Proof Authentication or Ding Detect have ads?

Neither Proof Authentication nor Ding Detect shows ads.

### Which is updated more often, Proof Authentication or Ding Detect?

Proof Authentication ships an update every 2 months, and Ding Detect every 2 weeks. Most recently, Proof Authentication was updated on September 8, 2026 and Ding Detect on September 22, 2026.

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