# QR Code Reader vs Dúo Calculator

The clearest difference is price: QR Code Reader at Free against Dúo Calculator's $1.99. QR Code Reader also leads on update cadence (every 10 days vs every 6 months) and device support (4 vs 1). Dúo Calculator's advantage is in-app purchases (none vs 4). On ads there is nothing between them.

QR Code Reader is free to download; Dúo Calculator costs $1.99 up front. QR Code Reader sells 4 in-app purchases, starting at $7.99 per 7 days. Dúo Calculator asks for nothing beyond the download.

QR Code Reader ships an update every 10 days, Dúo Calculator every 6 months. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | QR Code Reader | Dúo Calculator |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[4.7 (128 ratings)](https://appshunter.io/ios/app/qr-code-reader/id6469319539/reviews)** | — |
| Number of ratings | **128** | — |
| Positive reviews | 24.1% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 6 months |
| Monetization | Subscription | — |
| Size | 53 MB | 3 MB |
| Requires iOS | **15.0** | 26.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Lilucat](https://appshunter.io/developer/1676061700) | [Alejandro Hernandez Mitre](https://appshunter.io/developer/1827109770) |

## What reviewers say

### QR Code Reader

[App page](https://appshunter.io/ios/app/qr-code-reader/id6469319539)

Easily scan and interpret various QR codes, including URLs, Wi-Fi, and contact information. Generate custom QR codes for social media, websites, and more. Seamlessly integrate codes into Apple Wallet and widgets, with a convenient scan history and backup feature.

**Highlights:** Scan all QR code types, Generate custom QR codes, Integrate codes into Apple Wallet, Add codes to Widgets, Scan from images, Scan history and backup

**Features:** Family Sharing, Apple Wallet

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| QR Code Scanner | $7.99 | per 7 days |
| QR Code Reader | $29.99 | per year |
| QR Code Reader | Free | one-time |
| QR Code Scanner | $59.99 | one-time |


### Dúo Calculator

[App page](https://appshunter.io/ios/app/duo-calculator/id6754038433)

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

**In-app purchases:** none


## Frequently asked questions

### Is QR Code Reader free?

QR Code Reader is free to download, with in-app purchases available.

### Is Dúo Calculator free?

Dúo Calculator costs $1.99, with no in-app purchases.

### Do QR Code Reader or Dúo Calculator have ads?

Neither QR Code Reader nor Dúo Calculator shows ads.

### Which is updated more often, QR Code Reader or Dúo Calculator?

QR Code Reader ships an update every 10 days, and Dúo Calculator every 6 months. Most recently, QR Code Reader was updated on October 24, 2026 and Dúo Calculator on October 28, 2026.

---

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