# Centering50 vs KŌINI Dice

The clearest difference is in-app purchases: KŌINI Dice at none against Centering50's 3. KŌINI Dice also leads on ads (none vs shown) and rating (4.9 vs 4.6). Centering50's advantage is ratings volume (42 vs 10). On price, device support 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. KŌINI Dice asks for nothing beyond the download.

KŌINI Dice holds the better App Store score, 4.9 against 4.6. Both are backed by a comparable volume of ratings — 42 and 10 respectively.

## The numbers

| Metric | Centering50 | KŌINI Dice |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (42 ratings)](https://appshunter.io/ios/app/centering50-card-grading-tool/id6759667301/reviews) | **[4.9 (10 ratings)](https://appshunter.io/ios/app/koini-dice/id6806729866/reviews)** |
| Number of ratings | **42** | 10 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 8 days | — |
| Monetization | Free with in-app purchases | **Free** |
| Size | 155 MB | 28 MB |
| Requires iOS | **16.2** | 16.4 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 17+ | 4+ |
| Developer | [FUK WAI LI](https://appshunter.io/developer/1880074668) | [Koini Global LLC](https://appshunter.io/developer/1891622340) |

## 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 |


### KŌINI Dice

[App page](https://appshunter.io/ios/app/koini-dice/id6806729866)

This app generates 99 individual six-sided dice rolls instantly using your device's cryptographic random number generator. It provides true entropy, ensuring each roll is exactly fair with a 1 in 6 probability for each face. The app operates completely offline with no ads, accounts, or tracking.

**Highlights:** Generates 99 six-sided dice rolls, Uses device's cryptographic random number generator, Provably fair results, Operates completely offline, No ads, accounts, or tracking, Displays per-face counts and running total

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

**In-app purchases:** none


## Frequently asked questions

### Is Centering50 free?

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

### Is KŌINI Dice free?

KŌINI Dice is free to download, with no in-app purchases.

### Which has better reviews, Centering50 or KŌINI Dice?

KŌINI Dice is rated higher. Centering50 averages 4.6 out of 5 from 42 ratings, while KŌINI Dice averages 4.9 from 10 ratings.

### Do Centering50 or KŌINI Dice have ads?

Centering50 shows ads; KŌINI Dice does not.

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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.*