# MQTT Spy — Testing pub/sub MQTT Protocol

> Tool for testing and monitoring MQTT protocol for IoT device control and sensor monitoring. (iPhone/iPad app by Gopi Gadhiya.)

- Source: https://appshunter.io/ios/app/mqtt-spy/id1564422794 (this page in markdown: same URL + `.md`)
- Developer: [Gopi Gadhiya](https://appshunter.io/developer/1387816354)
- Category: Developer Tools, Utilities
- Price: $0.99 with in-app purchases
- Rating: 4.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 10.0 · 26 MB
- Languages: American English
- Released: 2021-05-26
- Data updated: 2026-09-01
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/mqtt-spy/id1564422794/reviews.md

## What is MQTT Spy?

INTRODUCTION:
- MQTT Spy is used for testing pub/sub protocol with MQTT
- Simply create a MQTT connection with broker and test MQTT messaging
- With this app, You can control any MQTT enabled IoT devices and monitor sensors with pub/sub protocol.

FEATURES:
- Save broker list
- Separate panels for subscribe and publish data
- Custom your own buttons for frequent publishing of same data.
- Monitoring receiving data as ASCII or HEX.
- Publish Data as ASCII or HEX.
- Auto send commands at timed interval
- Selection for \r \n at the end of sending data.
- Send Log file of Subscribed and Published data.
- Keep Screen on/off option.

## Key features

- Save broker list
- Custom publish buttons
- Monitor data as ASCII or HEX
- Auto-send commands at intervals
- Keep screen on/off option
- Send log files

## Pricing and in-app purchases

Base price: $0.99.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |



## Frequently asked questions about MQTT Spy

### What is MQTT Spy used for?

MQTT Spy is used for testing the pub/sub MQTT protocol. It allows you to create MQTT connections, test messaging, control MQTT-enabled IoT devices, and monitor sensors.

### Does MQTT Spy have ads?

Yes, MQTT Spy contains advertisements. It is a free application with in-app purchases.

### What devices does MQTT Spy support?

MQTT Spy supports a wide range of Apple devices including Mac, iPhone, iPad, and iPod.

### How often is MQTT Spy updated?

The latest version of MQTT Spy is 1.3, and it was last updated on February 16, 2022.

### What is the price of MQTT Spy?

MQTT Spy is available for $0.99. It also offers in-app purchases.

### Can I save my MQTT broker connections in MQTT Spy?

Yes, MQTT Spy allows you to save your broker list, making it convenient to reconnect to frequently used brokers.

### What age rating does MQTT Spy have?

MQTT Spy has an age rating of 4+, making it suitable for a broad audience.

### Can MQTT Spy monitor sensor data?

Yes, MQTT Spy can monitor sensors with the pub/sub protocol, allowing you to view data in ASCII or HEX format.

## Version history (last 3 releases)

### 1.3 — 2022-02-16

Bug fixes and performance improvements

### 1.2 — 2021-12-08

Bug fixes and performance improvements

### 1.0 — 2021-05-31

No release notes.

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## More apps by Gopi Gadhiya

- [TCP Telnet Terminal](https://appshunter.io/ios/app/tcp-telnet-terminal/id1387816355)
- [BLE Terminal HM-10](https://appshunter.io/ios/app/ble-terminal-hm-10/id1398703795)
- [UDP Terminal](https://appshunter.io/ios/app/udp-terminal/id1399547636)
- [TCP Server](https://appshunter.io/ios/app/tcp-server/id1402550566)
- [MQTT Terminal](https://appshunter.io/ios/app/mqtt-terminal/id1404331673)
- [WiFi Automation ESP8266](https://appshunter.io/ios/app/wifi-automation-esp8266/id1408689519)

All apps by Gopi Gadhiya: https://appshunter.io/developer/1387816354

## Related topics

[iot mqtt](https://appshunter.io/ios/topics/iot-mqtt) · [iot mqtt panel](https://appshunter.io/ios/topics/iot-mqtt-panel)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-01.*