# Modbus TCP Pro vs KNX Inspector

The clearest difference is price: KNX Inspector at Free against Modbus TCP Pro's $11.99. KNX Inspector also leads on iOS requirement (17.6 vs 26.1). On review sentiment, ads, in-app purchases and monetization model there is nothing between them.

KNX Inspector is free to download; Modbus TCP Pro costs $11.99 up front. Modbus TCP Pro sells 1 one-off in-app purchase and KNX Inspector sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Modbus TCP Pro | KNX Inspector |
| --- | --- | --- |
| Price | $11.99 | **Free** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | — |
| Monetization | Free | Free |
| Size | 2 MB | 6 MB |
| Requires iOS | 26.1 | **17.6** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Bernard Struelens](https://appshunter.io/developer/1802500832) | [Kurenz Music GbR](https://appshunter.io/developer/544695186) |

## What reviewers say

### Modbus TCP Pro

[App page](https://appshunter.io/ios/app/modbus-tcp-pro/id6756293575)

This tool allows professionals to test, read, and write Modbus registers directly from their iPhone. It offers robust connectivity and support for various data types, making it ideal for field testing and debugging industrial control systems.

**Highlights:** Modbus TCP connectivity, Read and write registers, Support for multiple data types, Configurable Unit ID, Instant feedback and error reporting, Designed for testing and debugging, Field testing without a laptop

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Modbus Pro | $24.99 | one-time |


### KNX Inspector

[App page](https://appshunter.io/ios/app/knx-inspector/id6764353992)

This professional tool analyzes and diagnoses KNX/IP installations. It connects to gateways, monitors real-time telegrams, checks group addresses, and compares live data with imported projects for troubleshooting and documentation.

**Highlights:** Real-time KNX/IP telegram monitoring, Group address checking and analysis, Physical device address scanning, Live data comparison with ETS projects, Bus alarm for targeted monitoring, KNX data type testing, Export for documentation

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| KNX Inspector Pro | $24.99 | one-time |


## Frequently asked questions

### Is Modbus TCP Pro free?

Modbus TCP Pro costs $11.99, and also offers in-app purchases.

### Is KNX Inspector free?

KNX Inspector is free to download, with in-app purchases available.

### Do Modbus TCP Pro or KNX Inspector have ads?

Neither Modbus TCP Pro nor KNX Inspector shows ads.

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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.*