# Arduino UDP vs QR Code Reader

The clearest difference is in-app purchases: Arduino UDP at none against QR Code Reader's 1. Arduino UDP also leads on ads (none vs shown) and update cadence (every 2 weeks vs every 5 months). On price and device support there is nothing between them.

Both are free to download. QR Code Reader sells 1 in-app purchase, starting at $7.99 per month. Arduino UDP asks for nothing beyond the download.

Arduino UDP ships an update every 2 weeks, QR Code Reader every 5 months. The most recent releases landed on October 16, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Arduino UDP | QR Code Reader |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 2 weeks** | Every 5 months |
| Size | 8 MB | 14 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [YASUYUKI INUKAI](https://appshunter.io/developer/689779927) | [Haan Apps](https://appshunter.io/developer/1447021433) |

## What reviewers say

### Arduino UDP

[App page](https://appshunter.io/ios/app/arduino-udp/id1467591011)

**In-app purchases:** none


### QR Code Reader

[App page](https://appshunter.io/ios/app/qr-code-reader-pdf-converter/id1612658784)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Pro | $7.99 | per month |


## Frequently asked questions

### Is Arduino UDP free?

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

### Is QR Code Reader free?

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

### Do Arduino UDP or QR Code Reader have ads?

QR Code Reader shows ads; Arduino UDP does not.

### Which is updated more often, Arduino UDP or QR Code Reader?

Arduino UDP ships an update every 2 weeks, and QR Code Reader every 5 months. Most recently, Arduino UDP was updated on October 16, 2026 and QR Code Reader on October 7, 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.*