# MQTT Spy vs iDevTools

The clearest difference is in-app purchases: iDevTools at none against MQTT Spy's 1. iDevTools also leads on ads (none vs shown) and chart position (#35 vs unranked). MQTT Spy's advantage is device support (4 vs 2) and iOS requirement (10.0 vs 17.0). On price and update cadence there is nothing between them.

MQTT Spy costs $0.99 and iDevTools $0.99 up front. MQTT Spy sells 1 one-off in-app purchase. iDevTools asks for nothing beyond the download.

MQTT Spy ships an update every 4 months, iDevTools every 3 months. The most recent releases landed on October 9, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | MQTT Spy | iDevTools |
| --- | --- | --- |
| Price | $0.99 | $0.99 |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/mqtt-spy/id1564422794/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Every 3 months** |
| Monetization | **Free with in-app purchases** | Paid |
| Best chart rank | — | **#35** |
| Size | 26 MB | 4 MB |
| Requires iOS | **10.0** | 17.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad |
| Age rating | 4+ | +4 |
| Developer | [Gopi Gadhiya](https://appshunter.io/developer/1387816354) | [奕 徐](https://appshunter.io/developer/1896745683) |

## What reviewers say

### MQTT Spy

[App page](https://appshunter.io/ios/app/mqtt-spy/id1564422794)

This application allows for testing the pub/sub MQTT protocol. Connect to an MQTT broker to send and receive messages, control IoT devices, and monitor sensors. It offers features for saving broker lists, custom publishing buttons, and data monitoring in ASCII or HEX.

**Highlights:** 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

**Features:** Vision Pro support

**In-app purchases (1)**

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


### iDevTools

[App page](https://appshunter.io/ios/app/idevtools/id6782373788)

**Currently charting:** #35 Top Paid · Developer Tools (US App Store)

This app brings desktop-class web developer tools to Safari on mobile devices. Inspect and edit web pages, run JavaScript, monitor network requests, and manage storage directly from your iPhone or iPad.

**Highlights:** Inspect HTML and CSS, Edit web pages, Run JavaScript in Console, View Network requests, Manage Cookies and Storage, Browse Sources, Audit pages

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

**In-app purchases:** none


## Frequently asked questions

### Is MQTT Spy free?

MQTT Spy costs $0.99, and also offers in-app purchases.

### Is iDevTools free?

iDevTools costs $0.99, with no in-app purchases.

### Do MQTT Spy or iDevTools have ads?

MQTT Spy shows ads; iDevTools does not.

### Which is updated more often, MQTT Spy or iDevTools?

MQTT Spy ships an update every 4 months, and iDevTools every 3 months. Most recently, MQTT Spy was updated on October 9, 2026 and iDevTools on October 21, 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.*