# Centering50 vs Gradeon

Centering50 and Gradeon are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Centering50 sells 3 in-app purchases, starting at $4.99 per month and Gradeon sells 6 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

Centering50 ships an update every 8 days, Gradeon every 2 weeks. The most recent releases landed on October 6, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Centering50 | Gradeon |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (28 ratings)](https://appshunter.io/ios/app/centering50-card-grading-tool/id6759667301/reviews)** | — |
| Number of ratings | **28** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 8 days** | Every 2 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 155 MB | 79 MB |
| Requires iOS | **16.2** | 16.4 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 17+ | 12+ |
| Developer | [FUK WAI LI](https://appshunter.io/developer/1880074668) | [Federico Vietti](https://appshunter.io/developer/1888004574) |

## 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 |


### Gradeon

[App page](https://appshunter.io/ios/app/gradeon/id6761143702)

**Features:** macOS Compatibility

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Gradeon Pro Monthly | $7.99 | per month |
| Gradeon Pro Yearly | $69.99 | per year |
| 2 Scan Tokens | $1.99 | one-time |
| 5 Scan Tokens | $3.99 | one-time |
| 15 Scan Tokens | $9.99 | one-time |
| 50 Scan Tokens | $22.99 | one-time |


## Frequently asked questions

### Is Centering50 free?

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

### Is Gradeon free?

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

### Do Centering50 or Gradeon have ads?

Both Centering50 and Gradeon show ads.

### Which is updated more often, Centering50 or Gradeon?

Centering50 ships an update every 8 days, and Gradeon every 2 weeks. Most recently, Centering50 was updated on October 6, 2026 and Gradeon on October 10, 2026.

---

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