# Grade.IQ vs Centering50

The clearest difference is ads: Grade.IQ at none against Centering50's shown. On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Grade.IQ sells 3 in-app purchases, starting at $2.99 per month and Centering50 sells 3 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Grade.IQ ships an update every 4 days, Centering50 every 8 days. Both last shipped on November 9, 2026.

## The numbers

| Metric | Grade.IQ | Centering50 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (54 ratings)](https://appshunter.io/ios/app/centering50-card-grading-tool/id6759667301/reviews)** |
| Number of ratings | — | **54** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 4 days** | Every 8 days |
| Monetization | — | Free with in-app purchases |
| Size | 50 MB | 155 MB |
| Requires iOS | **15.1** | 16.2 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [MARCUS WILSON HUGHES](https://appshunter.io/developer/1877077258) | [FUK WAI LI](https://appshunter.io/developer/1880074668) |

## What reviewers say

### Grade.IQ

[App page](https://appshunter.io/ios/app/gradeiq/id6759155592)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Grade Curious | $2.99 | per month |
| Grade Enthusiast | $5.99 | per month |
| Grade Obsessed | $9.99 | per month |


### Centering50

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

This tool helps collectors accurately measure card centering for TCG and sports cards. It uses AI and precision tools to predict grades before submission, saving money on grading fees. Analyze both front and back for optimal results.

**Highlights:** Smart-Snap AI for fast scanning, Auto-Straighten Technology, Magenta Line Manual Mode, Grading Standard Library comparison, Front & Back Analysis, 15x Precision Zoom

**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 |


## Frequently asked questions

### Is Grade.IQ free?

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

### Is Centering50 free?

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

### Do Grade.IQ or Centering50 have ads?

Centering50 shows ads; Grade.IQ does not.

### Which is updated more often, Grade.IQ or Centering50?

Grade.IQ ships an update every 4 days, and Centering50 every 8 days. Most recently, Grade.IQ was updated on November 9, 2026 and Centering50 on November 9, 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.*