# eMemorybox vs CenterGrade App

The clearest difference is in-app purchases: eMemorybox at none against CenterGrade App's 5. eMemorybox also leads on ads (none vs shown) and iOS requirement (15.6 vs 17.0). On price, update cadence and device support there is nothing between them.

Both are free to download. CenterGrade App sells 5 one-off in-app purchases. eMemorybox asks for nothing beyond the download.

eMemorybox ships an update every 2 months, CenterGrade App every 4 weeks. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | eMemorybox | CenterGrade App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/centergrade-app/id6759246214/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 4 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 38 MB | 19 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Ememorybox Ltd](https://appshunter.io/developer/1832166806) | [Gabin Williams](https://appshunter.io/developer/1877631093) |

## What reviewers say

### eMemorybox

[App page](https://appshunter.io/ios/app/ememorybox/id6749795021)

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

**In-app purchases:** none


### CenterGrade App

[App page](https://appshunter.io/ios/app/centergrade-app/id6759246214)

This app uses AI to analyze card centering and predict grading outcomes for multiple companies. It also provides real-time market data and ROI calculations to help collectors make informed decisions before submitting cards for grading.

**Highlights:** AI centering analysis, Grade predictions for 6 companies, Real-time card values, ROI calculator, Market Pulse liquidity scores, On-device processing

**Features:** Family Sharing

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Coffee Tip | $0.99 | one-time |
| Lunch Tip | $2.99 | one-time |
| CenterGrade App Pro | $4.99 | one-time |
| Dinner Tip | $4.99 | one-time |
| Pack Tip | $9.99 | one-time |


## Frequently asked questions

### Is eMemorybox free?

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

### Is CenterGrade App free?

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

### Do eMemorybox or CenterGrade App have ads?

CenterGrade App shows ads; eMemorybox does not.

### Which is updated more often, eMemorybox or CenterGrade App?

eMemorybox ships an update every 2 months, and CenterGrade App every 4 weeks. Most recently, eMemorybox was updated on October 25, 2026 and CenterGrade App on October 24, 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.*