# Feldfühler vs KRL SmartBox

The clearest difference is update cadence: Feldfühler at every 4 weeks against KRL SmartBox's every 7 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Feldfühler ships an update every 4 weeks, KRL SmartBox every 7 months. The most recent releases landed on October 24, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Feldfühler | KRL SmartBox |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 weeks** | Every 7 months |
| Size | 63 MB | 33 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Netscrapers UG (haftungsbeschraenkt) & Co. KG](https://appshunter.io/developer/1516611754) | [Witte Metallwaren Handelsges. mbH & Co. KG](https://appshunter.io/developer/979847433) |

## What reviewers say

### Feldfühler

[App page](https://appshunter.io/ios/app/feldfuhler/id1613905676)

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

**In-app purchases:** none


### KRL SmartBox

[App page](https://appshunter.io/ios/app/krl-smartbox/id6477445537)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Feldfühler free?

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

### Is KRL SmartBox free?

KRL SmartBox is free to download, with no in-app purchases.

### Do Feldfühler or KRL SmartBox have ads?

Neither Feldfühler nor KRL SmartBox shows ads.

### Which is updated more often, Feldfühler or KRL SmartBox?

Feldfühler ships an update every 4 weeks, and KRL SmartBox every 7 months. Most recently, Feldfühler was updated on October 24, 2026 and KRL SmartBox on October 5, 2026.

---

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