# Centering50 vs Ding Detect

The clearest difference is review sentiment: Ding Detect at 100% against Centering50's 0%. Ding Detect also leads on rating (5.0 vs 4.5) and ads (none vs shown). Centering50's advantage is ratings volume (26 vs 2) and update cadence (every 8 days vs every 2 weeks). On price, in-app purchases, monetization model and iOS requirement there is nothing between them.

Both are free to download. Centering50 sells 3 in-app purchases, starting at $4.99 per month and Ding Detect sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Ding Detect holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Centering50 has 26 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 0% of Centering50's written reviews are positive against 100% of Ding Detect's.

Centering50 ships an update every 8 days, Ding Detect every 2 weeks. The most recent releases landed on September 19, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Centering50 | Ding Detect |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (26 ratings)](https://appshunter.io/ios/app/centering50-card-grading-tool/id6759667301/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/ding-detect/id6773055856/reviews)** |
| Number of ratings | **26** | 2 |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 8 days** | Every 2 weeks |
| Monetization | Free with in-app purchases | Freemium |
| Size | 155 MB | 66 MB |
| Requires iOS | 16.2 | **15.5** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [FUK WAI LI](https://appshunter.io/developer/1880074668) | [Techcave, LLC](https://appshunter.io/developer/907191026) |

## What reviewers say

### Centering50

[App page](https://appshunter.io/ios/app/centering50-card-grading-tool/id6759667301)

This tool helps collectors accurately measure card centering ratios for TCG and sports cards. It uses AI-assisted scanning and manual guides to provide precise measurements, helping users predict grades and save on submission fees.

**Highlights:** AI-assisted border detection, Manual measurement guides, Front and back analysis, 15x precision zoom, Grading standard library, Dynamic contrast adjustment

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Monthly | $4.99 | per month |
| Unlimited Yearly | $24.99 | per year |
| Full Version Lifetime Access | $49.99 | one-time |


### 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 Centering50 free?

Centering50 is free to download, with in-app purchases available.

### Is Ding Detect free?

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

### Which has better reviews, Centering50 or Ding Detect?

Ding Detect is rated higher. Centering50 averages 4.5 out of 5 from 26 ratings, while Ding Detect averages 5.0 from 2 ratings.

### Do Centering50 or Ding Detect have ads?

Centering50 shows ads; Ding Detect does not.

### Which is updated more often, Centering50 or Ding Detect?

Centering50 ships an update every 8 days, and Ding Detect every 2 weeks. Most recently, Centering50 was updated on September 19, 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.*