# DUO System vs BIM DPF GUARD

The clearest difference is in-app purchases: DUO System at none against BIM DPF GUARD's 1. DUO System also leads on iOS requirement (12.0 vs 15.0). BIM DPF GUARD's advantage is update cadence (every 3 days vs every 9 months). On price, ads and device support there is nothing between them.

Both are free to download. BIM DPF GUARD sells 1 in-app purchase, starting at $9.99 per year. DUO System asks for nothing beyond the download.

DUO System ships an update every 9 months, BIM DPF GUARD every 3 days. The most recent releases landed on October 24, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | DUO System | BIM DPF GUARD |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 3 days** |
| Monetization | Free | — |
| Size | 15 MB | 3 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Aci Farfisa](https://appshunter.io/developer/1124362356) | [Dia Amadores srl](https://appshunter.io/developer/6809823403) |

## 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


### BIM DPF GUARD

[App page](https://appshunter.io/ios/app/bim-dpf-guard/id6813428375)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| BIM DPF GUARD Premium | $9.99 | per year |


## Frequently asked questions

### Is DUO System free?

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

### Is BIM DPF GUARD free?

BIM DPF GUARD is free to download, with in-app purchases available.

### Do DUO System or BIM DPF GUARD have ads?

Neither DUO System nor BIM DPF GUARD shows ads.

### Which is updated more often, DUO System or BIM DPF GUARD?

DUO System ships an update every 9 months, and BIM DPF GUARD every 3 days. Most recently, DUO System was updated on October 24, 2026 and BIM DPF GUARD on October 26, 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.*