# MQTT Spy vs Device Information Tool

The clearest difference is in-app purchases: Device Information Tool at none against MQTT Spy's 1. Device Information Tool also leads on ads (none vs shown) and update cadence (monthly vs every 4 months). MQTT Spy's advantage is iOS requirement (10.0 vs 15.0). On price and device support there is nothing between them.

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

MQTT Spy ships an update every 4 months, Device Information Tool monthly. The most recent releases landed on October 9, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | MQTT Spy | Device Information Tool |
| --- | --- | --- |
| 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 | **Monthly** |
| Monetization | Free with in-app purchases | — |
| Best chart rank | — | **#47** |
| Size | 26 MB | 7 MB |
| Requires iOS | **10.0** | 15.0 |
| Devices | iPhone, iPad, iPod, Mac | iPhone, iPad, iPod, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Gopi Gadhiya](https://appshunter.io/developer/1387816354) | [Kudit LLC](https://appshunter.io/developer/284146896) |

## 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 |


### Device Information Tool

[App page](https://appshunter.io/ios/app/device-information-tool/id6736626499)

**Currently charting:** #47 Top Paid · Developer Tools (US App Store)

**Features:** 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 Device Information Tool free?

Device Information Tool costs $0.99, with no in-app purchases.

### Do MQTT Spy or Device Information Tool have ads?

MQTT Spy shows ads; Device Information Tool does not.

### Which is updated more often, MQTT Spy or Device Information Tool?

MQTT Spy ships an update every 4 months, and Device Information Tool monthly. Most recently, MQTT Spy was updated on October 9, 2026 and Device Information Tool on October 7, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*