# Dumesnil vs SIRENE Tech.

The clearest difference is update cadence: SIRENE Tech. at every 2 months against Dumesnil's every 4 months. Dumesnil's advantage is iOS requirement (11.0 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.

Dumesnil ships an update every 4 months, SIRENE Tech. every 2 months. The most recent releases landed on September 26, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Dumesnil | SIRENE Tech. |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | — | Free |
| Size | 84 MB | 56 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [ANALYS INFORMATIQUE](https://appshunter.io/developer/1465595739) | [e-Conception](https://appshunter.io/developer/883300086) |

## What reviewers say

### Dumesnil

[App page](https://appshunter.io/ios/app/dumesnil/id1559263292)

**Features:** macOS Compatibility

**In-app purchases:** none


### SIRENE Tech.

[App page](https://appshunter.io/ios/app/sirene-tech/id1586825128)

This app allows users to actively participate in environmental data collection by submitting observations from the field. Users can geolocate, add details, view other submissions, and communicate with a community dedicated to nature protection.

**Highlights:** Field observation submission, Geolocation tagging, Community interaction, Information alerts, Nature protection focus

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

**In-app purchases:** none


## Frequently asked questions

### Is Dumesnil free?

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

### Is SIRENE Tech. free?

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

### Do Dumesnil or SIRENE Tech. have ads?

Neither Dumesnil nor SIRENE Tech. shows ads.

### Which is updated more often, Dumesnil or SIRENE Tech.?

Dumesnil ships an update every 4 months, and SIRENE Tech. every 2 months. Most recently, Dumesnil was updated on September 26, 2026 and SIRENE Tech. on October 18, 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.*