# ACE vs CenterGrade App

The clearest difference is ads: ACE at none against CenterGrade App's shown. ACE also leads on update cadence (daily vs every 4 weeks) and iOS requirement (15.1 vs 17.0). On price, rating, ratings volume and in-app purchases there is nothing between them.

Both are free to download. ACE sells 1 in-app purchase, starting at $4.99 per month and CenterGrade App sells 5 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 5.0 for ACE against 5.0 for CenterGrade App. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

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

## The numbers

| Metric | ACE | CenterGrade App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/ace-optcg-pregrading/id6758323301/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/centergrade-app/id6759246214/reviews) |
| Number of ratings | 1 | **2** |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Daily** | Every 4 weeks |
| Monetization | Freemium | Free with in-app purchases |
| Size | 41 MB | 19 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Terror LLC](https://appshunter.io/developer/1350269675) | [Gabin Williams](https://appshunter.io/developer/1877631093) |

## What reviewers say

### ACE

[App page](https://appshunter.io/ios/app/ace-optcg-pregrading/id6758323301)

This app uses AI to analyze your One Piece Trading Card Game cards, providing detailed pre-grade estimates with subgrades for centering, corners, edges, and surface. It automatically identifies cards and compares them to reference images, offering a convenient way to assess your collection's condition.

**Highlights:** AI-powered card grading, Detailed grade reports with subgrades, Automatic card identification, Reference image comparison, Batch grading for multiple cards, Shareable grade reports, Scan history tracking

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ace premium monthly | $4.99 | per month |


### 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 ACE free?

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

### Is CenterGrade App free?

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

### Which has better reviews, ACE or CenterGrade App?

ACE and CenterGrade App are both rated 5.0 out of 5 on the App Store, from 1 and 2 ratings respectively.

### Do ACE or CenterGrade App have ads?

CenterGrade App shows ads; ACE does not.

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

ACE ships an update daily, and CenterGrade App every 4 weeks. Most recently, ACE 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.*