# QR Scan Craft vs Duodecuple Calc

The clearest difference is ads: QR Scan Craft at none against Duodecuple Calc's shown. QR Scan Craft also leads on iOS requirement (13.0 vs 15.8.3). Duodecuple Calc's advantage is update cadence (every 2 weeks vs every 2 months). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

QR Scan Craft ships an update every 2 months, Duodecuple Calc every 2 weeks. The most recent releases landed on February 23, 2026 and August 3, 2026 respectively.

## The numbers

| Metric | QR Scan Craft | Duodecuple Calc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Size | 43 MB | 36 MB |
| Requires iOS | **13.0** | 15.8.3 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Reno Softwares](https://appshunter.io/developer/1778003915) | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) |

## What reviewers say

### QR Scan Craft

[App page](https://appshunter.io/ios/app/qr-scan-craft/id6738000853)

**Features:** macOS Compatibility

**In-app purchases:** none


### Duodecuple Calc

[App page](https://appshunter.io/ios/app/duodecuple-calc/id6742208421)

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

**In-app purchases:** none


## Frequently asked questions

### Is QR Scan Craft free?

QR Scan Craft is free to download, with no in-app purchases.

### Is Duodecuple Calc free?

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

### Do QR Scan Craft or Duodecuple Calc have ads?

Duodecuple Calc shows ads; QR Scan Craft does not.

### Which is updated more often, QR Scan Craft or Duodecuple Calc?

QR Scan Craft ships an update every 2 months, and Duodecuple Calc every 2 weeks. Most recently, QR Scan Craft was updated on February 23, 2026 and Duodecuple Calc on August 3, 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.*