# Fermax DuoxMe vs DSI Impulsa

The clearest difference is in-app purchases: DSI Impulsa at none against Fermax DuoxMe's 2. DSI Impulsa also leads on iOS requirement (15.1 vs 18.0). Fermax DuoxMe's advantage is update cadence (monthly vs every 5 months). On price, ads and device support there is nothing between them.

Both are free to download. Fermax DuoxMe sells 2 in-app purchases, starting at $2.00 per month. DSI Impulsa asks for nothing beyond the download.

Fermax DuoxMe ships an update monthly, DSI Impulsa every 5 months. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Fermax DuoxMe | DSI Impulsa |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (263 ratings)](https://appshunter.io/ios/app/fermax-duoxme/id1442204916/reviews)** | — |
| Number of ratings | **263** | — |
| Positive reviews | 55.1% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Monthly** | Every 5 months |
| Monetization | Free with in-app purchases | — |
| Size | 150 MB | 23 MB |
| Requires iOS | 18.0 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Fermax](https://appshunter.io/developer/891332024) | [LOGICAL DESIGN E.I.R.L.](https://appshunter.io/developer/1251029749) |

## What reviewers say

### Fermax DuoxMe

[App page](https://appshunter.io/ios/app/fermax-duoxme/id1442204916)

Control your Fermax video door entry system remotely. Answer calls, open doors, and check visitors from anywhere in the world. Share digital keys securely with family and friends, simplifying access to your home.

**Highlights:** Answer video door calls remotely, Open doors instantly, Check visitor history, Share digital keys, Connect via Wi-Fi monitor or Fermax CONNECT

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Monthly | $2.00 | per month |
| Unlimited annual | $17.00 | per year |


### DSI Impulsa

[App page](https://appshunter.io/ios/app/dsi-impulsa/id6749189968)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Fermax DuoxMe free?

Fermax DuoxMe is free to download, with in-app purchases available.

### Is DSI Impulsa free?

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

### Do Fermax DuoxMe or DSI Impulsa have ads?

Neither Fermax DuoxMe nor DSI Impulsa shows ads.

### Which is updated more often, Fermax DuoxMe or DSI Impulsa?

Fermax DuoxMe ships an update monthly, and DSI Impulsa every 5 months. Most recently, Fermax DuoxMe was updated on October 24, 2026 and DSI Impulsa 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.*