# Holtek MCU Selector vs Fumigation Machine

The clearest difference is update cadence: Fumigation Machine at every 3 weeks against Holtek MCU Selector's every 2 months. Holtek MCU Selector's advantage is iOS requirement (13.0 vs 15.0). 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.

Holtek MCU Selector ships an update every 2 months, Fumigation Machine every 3 weeks. The most recent releases landed on October 25, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Holtek MCU Selector | Fumigation Machine |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Size | 19 MB | 23 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Holtek Semiconductor(China) Inc](https://appshunter.io/developer/1052056181) | [YeungYu Electronics Co.,Ltd.](https://appshunter.io/developer/1038746387) |

## What reviewers say

### Holtek MCU Selector

[App page](https://appshunter.io/ios/app/holtek-mcu-selector/id6444018542)

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

**In-app purchases:** none


### Fumigation Machine

[App page](https://appshunter.io/ios/app/fumigation-machine/id6444781235)

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

**In-app purchases:** none


## Frequently asked questions

### Is Holtek MCU Selector free?

Holtek MCU Selector is free to download, with no in-app purchases.

### Is Fumigation Machine free?

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

### Do Holtek MCU Selector or Fumigation Machine have ads?

Neither Holtek MCU Selector nor Fumigation Machine shows ads.

### Which is updated more often, Holtek MCU Selector or Fumigation Machine?

Holtek MCU Selector ships an update every 2 months, and Fumigation Machine every 3 weeks. Most recently, Holtek MCU Selector was updated on October 25, 2026 and Fumigation Machine on October 29, 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.*