# SIRENE Tech. vs Stophytra

The clearest difference is iOS requirement: Stophytra at 11.0 against SIRENE Tech.'s 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on August 20, 2026 and September 6, 2026 respectively.

## The numbers

| Metric | SIRENE Tech. | Stophytra |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free | — |
| Size | 59 MB | 84 MB |
| Requires iOS | 15.0 | **11.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [e-Conception](https://appshunter.io/developer/883300086) | [ANALYS INFORMATIQUE](https://appshunter.io/developer/1465595739) |

## What reviewers say

### 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


### Stophytra

[App page](https://appshunter.io/ios/app/stophytra/id6448786109)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SIRENE Tech. free?

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

### Is Stophytra free?

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

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

Neither SIRENE Tech. nor Stophytra shows ads.

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

SIRENE Tech. ships an update every 2 months, and Stophytra every 2 months. Most recently, SIRENE Tech. was updated on August 20, 2026 and Stophytra on September 6, 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.*