# MqttClient vs Calex PyroNFC

The clearest difference is update cadence: Calex PyroNFC at every 3 weeks against MqttClient's every 10 months. Calex PyroNFC also leads on iOS requirement (8.0 vs 16.0). On price, rating, review sentiment and ratings volume there is nothing between them.

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

On the App Store both sit at effectively the same score — 1.0 for MqttClient against 1.0 for Calex PyroNFC. Both are backed by a comparable volume of ratings — 1 and 1 respectively. Written reviews split almost evenly too, at 0% and 0% positive.

MqttClient ships an update every 10 months, Calex PyroNFC every 3 weeks. The most recent releases landed on October 6, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | MqttClient | Calex PyroNFC |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/mqttclient/id928932457/reviews) | [1.0 (1 ratings)](https://appshunter.io/ios/app/calex-pyronfc/id1544238822/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 1 MB | 32 MB |
| Requires iOS | 16.0 | **8.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Luca Ceci](https://appshunter.io/developer/923764949) | [Calex Electronics Limited](https://appshunter.io/developer/1544238824) |

## What reviewers say

### MqttClient

[App page](https://appshunter.io/ios/app/mqttclient/id928932457)

This utility app provides a fast client for MQTT, the internet of things protocol. It allows users to test broker servers, monitor topics, send and receive messages, and save configurations for quick access. It's designed for testing MQTT broker activities.

**Highlights:** MQTT client functionality, Broker server testing, Topic monitoring, Send and receive messages, Save configurations, User/password authentication

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

**In-app purchases:** none


### Calex PyroNFC

[App page](https://appshunter.io/ios/app/calex-pyronfc/id1544238822)

Configure infrared temperature sensors and read their current temperature using your device. Save settings to your phone and transfer them wirelessly to the sensor via NFC. You can also use NFC to capture temperature readings directly from the sensor.

**Highlights:** Configure PyroNFC sensor settings, Save settings to iOS device, Transmit settings via NFC, Read temperature via NFC, Select temperature units (°C/°F), Set linear voltage output range, Configure alarm thresholds

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is MqttClient free?

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

### Is Calex PyroNFC free?

Calex PyroNFC is free to download, with no in-app purchases.

### Which has better reviews, MqttClient or Calex PyroNFC?

MqttClient and Calex PyroNFC are both rated 1.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do MqttClient or Calex PyroNFC have ads?

Neither MqttClient nor Calex PyroNFC shows ads.

### Which is updated more often, MqttClient or Calex PyroNFC?

MqttClient ships an update every 10 months, and Calex PyroNFC every 3 weeks. Most recently, MqttClient was updated on October 6, 2026 and Calex PyroNFC on October 29, 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.*