# QR Code (Pro) vs Card Centering Calculator

The clearest difference is rating: Card Centering Calculator at 4.7 against QR Code (Pro)'s 2.6. Card Centering Calculator also leads on update cadence (monthly vs every 16 months) and ratings volume (2.5K vs 5). QR Code (Pro)'s advantage is in-app purchases (none vs 5) and ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. Card Centering Calculator sells 5 one-off in-app purchases. QR Code (Pro) asks for nothing beyond the download.

Card Centering Calculator holds the better App Store score, 4.7 against 2.6. That said, the two scores are not equally well evidenced: Card Centering Calculator has 2.5K ratings behind it against 5, so its average is the more settled of the two. Written reviews complicate that: 75% of QR Code (Pro)'s written reviews are positive against 60% of Card Centering Calculator's, so the app with the better star average is not the one people write more warmly about.

QR Code (Pro) ships an update every 16 months, Card Centering Calculator monthly. The most recent releases landed on October 10, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | QR Code (Pro) | Card Centering Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.6 (5 ratings)](https://appshunter.io/ios/app/qr-code-pro/id1490112564/reviews) | **[4.7 (2.5K ratings)](https://appshunter.io/ios/app/card-centering-calculator/id6661022837/reviews)** |
| Number of ratings | 5 | **2.5K** |
| Positive reviews | **75.0% of reviews** | 60.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 16 months | **Monthly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 15 MB | 21 MB |
| Requires iOS | **11.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Peter Bohl](https://appshunter.io/developer/1075788156) | [Jade Lizard Software LLC](https://appshunter.io/developer/528029155) |

## What reviewers say

### QR Code (Pro)

[App page](https://appshunter.io/ios/app/qr-code-pro/id1490112564)

Scan and analyze QR codes directly from your photo library. This utility allows you to select images and use the share function to process multiple QR codes within a single picture.

**Highlights:** Scan QR codes from images, Process multiple QR codes per image, Utilize photo library integration, Share function for easy processing

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

**In-app purchases:** none


### Card Centering Calculator

[App page](https://appshunter.io/ios/app/card-centering-calculator/id6661022837)

This app helps collectors and traders measure card centering ratios for grading. It uses AI to detect centering or allows manual adjustments for precise measurements, displaying potential grades from major companies.

**Highlights:** AI-powered card centering detection, Manual centering measurement with zoom, Grade comparisons for PSA, BGS, SGC, CGC, TAG, ACE, Front and back side centering measurement, Grading standards reference guide, Off-center visualization tool

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Tip | $0.99 | one-time |
| Medium Tip | $1.99 | one-time |
| Unlock Premium | $4.99 | one-time |
| Large Tip | $4.99 | one-time |
| Pristine Tip | $9.99 | one-time |

**What reviewers like**

- 👍 Intuitive and flexible
- 🚀 Provides great information on centering
- 💡 Helpful for graders and collectors
- 👍 Easy to use and user-friendly
- 👍 Accurate and works as a physical tool

**What reviewers complain about**

- 🐛 Centering measurement doesn't work properly
- 🔒 Grading information locked behind paywall
- 🐛 Camera quality issues, app resets during use

**Reported bugs**

- Centering measurement resets during use
- Image rotation doesn't stay in place

**Requested features**

- Thinner and dashed centering lines for better visibility
- Free access to grading information without subscription


## Frequently asked questions

### Is QR Code (Pro) free?

QR Code (Pro) is free to download, with no in-app purchases.

### Is Card Centering Calculator free?

Card Centering Calculator is free to download, with in-app purchases available.

### Which has better reviews, QR Code (Pro) or Card Centering Calculator?

Card Centering Calculator is rated higher. QR Code (Pro) averages 2.6 out of 5 from 5 ratings, while Card Centering Calculator averages 4.7 from 2.5K ratings.

### Do QR Code (Pro) or Card Centering Calculator have ads?

Card Centering Calculator shows ads; QR Code (Pro) does not.

### Which is updated more often, QR Code (Pro) or Card Centering Calculator?

QR Code (Pro) ships an update every 16 months, and Card Centering Calculator monthly. Most recently, QR Code (Pro) was updated on October 10, 2026 and Card Centering Calculator on October 15, 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.*