# 39Tools vs KNX Inspector

The clearest difference is in-app purchases: 39Tools at none against KNX Inspector's 1. 39Tools also leads on iOS requirement (12.0 vs 17.6). On price, ads and device support there is nothing between them.

Both are free to download. KNX Inspector sells 1 one-off in-app purchase. 39Tools asks for nothing beyond the download.

## The numbers

| Metric | 39Tools | KNX Inspector |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 9 months | — |
| Monetization | — | Free |
| Size | 112 MB | 6 MB |
| Requires iOS | **12.0** | 17.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [策 王](https://appshunter.io/developer/1681706231) | [Kurenz Music GbR](https://appshunter.io/developer/544695186) |

## What reviewers say

### 39Tools

[App page](https://appshunter.io/ios/app/39tools/id6447797534)

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

**In-app purchases:** none


### 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 39Tools free?

39Tools is free to download, with no in-app purchases.

### Is KNX Inspector free?

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

### Do 39Tools or KNX Inspector have ads?

Neither 39Tools 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.*