# DUO System vs CombiApp

The clearest difference is review sentiment: DUO System at 100% against CombiApp's 25%. DUO System also leads on iOS requirement (12.0 vs 15.6). CombiApp's advantage is update cadence (every 2 months vs every 9 months). On price, ads, in-app purchases and monetization model there is nothing between them.

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

DUO System ships an update every 9 months, CombiApp every 2 months. The most recent releases landed on October 5, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | DUO System | CombiApp |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | **100.0% of reviews** | 25.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 15 MB | 85 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [ACI srl](https://appshunter.io/developer/1124362356) | [Combivox Srl Unipersonale](https://appshunter.io/developer/1203005996) |

## What reviewers say

### DUO System

[App page](https://appshunter.io/ios/app/duo-system/id1492297534)

Easily program Farfisa Duo System devices with this intuitive application. Streamline your device setup and configuration process.

**Highlights:** Program Farfisa Duo System devices, Intuitive interface, Streamlined configuration, Device setup assistance

**Features:** macOS Compatibility

**In-app purchases:** none


### CombiApp

[App page](https://appshunter.io/ios/app/combiapp/id1535981570)

This virtual assistant provides security sector professionals with tools for system monitoring, catalog access, and warranty extensions. It offers real-time notifications for system faults and updates on new products and offers.

**Highlights:** Real-time system monitoring and fault notifications, Access to updated product catalog and price lists, View brochures and video presentations, Access device manuals and video tutorials, Activate 7-year warranty extensions, Create and store client quotes, Receive Combivox news and offers via push notifications

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is DUO System free?

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

### Is CombiApp free?

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

### Do DUO System or CombiApp have ads?

Neither DUO System nor CombiApp shows ads.

### Which is updated more often, DUO System or CombiApp?

DUO System ships an update every 9 months, and CombiApp every 2 months. Most recently, DUO System was updated on October 5, 2026 and CombiApp on October 4, 2026.

---

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