# QR code vs MD Monitor

The clearest difference is ads: MD Monitor at none against QR code's shown. QR code's advantage is iOS requirement (13.0 vs 15.1). On price, update cadence, 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 code ships an update every 3 months, MD Monitor every 2 months. The most recent releases landed on October 23, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | QR code | MD Monitor |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/md-monitor/id6748325743/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | — | Free |
| Size | 18 MB | 24 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Shraddha Limbasiya](https://appshunter.io/developer/1713525187) | [Merakai, LLC](https://appshunter.io/developer/1136297273) |

## What reviewers say

### QR code

[App page](https://appshunter.io/ios/app/qr-code-quick-response-code/id1622022453)

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

**In-app purchases:** none


### MD Monitor

[App page](https://appshunter.io/ios/app/md-monitor/id6748325743)

This app provides real-time monitoring of device power, temperature, and humidity. It sends instant alerts for critical environmental changes, helping to protect equipment and data in sensitive operations. Integrates with MySpool and Shelly devices for comprehensive oversight.

**Highlights:** MySpool and Shelly integration, Real-time power, temperature, humidity monitoring, Instant push, SMS, and email alerts, Activity timeline and chain of custody, Exportable audit log, Maintenance reminders and scheduled reports

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is QR code free?

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

### Is MD Monitor free?

MD Monitor is free to download, with no in-app purchases.

### Do QR code or MD Monitor have ads?

QR code shows ads; MD Monitor does not.

### Which is updated more often, QR code or MD Monitor?

QR code ships an update every 3 months, and MD Monitor every 2 months. Most recently, QR code was updated on October 23, 2026 and MD Monitor on October 8, 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.*