# KULDIG Preview vs Voice Control fischertechnik

The clearest difference is update cadence: KULDIG Preview at every 2 months against Voice Control fischertechnik's every 9 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.

KULDIG Preview ships an update every 2 months, Voice Control fischertechnik every 9 months. The most recent releases landed on October 25, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | KULDIG Preview | Voice Control fischertechnik |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 9 months |
| Monetization | — | Free |
| Size | 51 MB | 58 MB |
| Requires iOS | 15.0 | **14.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | +4 |
| Developer | [KULDIG](https://appshunter.io/developer/1315396634) | [fischertechnik](https://appshunter.io/developer/1569643516) |

## What reviewers say

### KULDIG Preview

[App page](https://appshunter.io/ios/app/kuldig-preview-app/id1557457576)

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

**In-app purchases:** none


### Voice Control fischertechnik

[App page](https://appshunter.io/ios/app/voice-control-fischertechnik/id1576162221)

Control your TXT 4.0 controller using voice commands. This app requires a program created in ROBO Pro Coding and a connection to the controller.

**Highlights:** Voice command control, TXT 4.0 controller integration, ROBO Pro Coding program creation, Wireless connection setup

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

**In-app purchases:** none


## Frequently asked questions

### Is KULDIG Preview free?

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

### Is Voice Control fischertechnik free?

Voice Control fischertechnik is free to download, with no in-app purchases.

### Do KULDIG Preview or Voice Control fischertechnik have ads?

Neither KULDIG Preview nor Voice Control fischertechnik shows ads.

### Which is updated more often, KULDIG Preview or Voice Control fischertechnik?

KULDIG Preview ships an update every 2 months, and Voice Control fischertechnik every 9 months. Most recently, KULDIG Preview was updated on October 25, 2026 and Voice Control fischertechnik on October 27, 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.*