# DUO System vs Innova by CSI

The clearest difference is update cadence: Innova by CSI at monthly against DUO System'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.

DUO System ships an update every 9 months, Innova by CSI monthly. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | DUO System | Innova by CSI |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Monthly** |
| Monetization | Free | — |
| Size | 15 MB | 2 MB |
| Requires iOS | **12.0** | 13.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Aci Farfisa](https://appshunter.io/developer/1124362356) | [Centro Sicurezza Italia SpA](https://appshunter.io/developer/929591607) |

## 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


### Innova by CSI

[App page](https://appshunter.io/ios/app/innova-by-csi/id1553051565)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is DUO System free?

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

### Is Innova by CSI free?

Innova by CSI is free to download, with no in-app purchases.

### Do DUO System or Innova by CSI have ads?

Neither DUO System nor Innova by CSI shows ads.

### Which is updated more often, DUO System or Innova by CSI?

DUO System ships an update every 9 months, and Innova by CSI monthly. Most recently, DUO System was updated on October 24, 2026 and Innova by CSI on October 25, 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.*