# Guide Zéphir vs SOS Oxygene

The clearest difference is review sentiment: SOS Oxygene at 100% against Guide Zéphir's 43%. SOS Oxygene also leads on update cadence (every 2 months vs every 5 months) and iOS requirement (13.0 vs 15.1). On price, ads, in-app purchases and monetization model there is nothing between them.

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

Guide Zéphir ships an update every 5 months, SOS Oxygene every 2 months. The most recent releases landed on August 27, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Guide Zéphir | SOS Oxygene |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 42.9% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 37 MB | 80 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [SOC PNEUMOLOGIE LANGUE FRANCAISE](https://appshunter.io/developer/1494910317) | [SOS Oxygene](https://appshunter.io/developer/956203394) |

## What reviewers say

### Guide Zéphir

[App page](https://appshunter.io/ios/app/guide-zephir/id596400437)

A therapeutic education tool for healthcare professionals and students, this app provides a directory of medical devices categorized by indication, therapeutic class, and INN. It includes enriching video content to support learning and practice.

**Highlights:** Therapeutic education tool, Directory of medical devices, Categorized by indication, Categorized by therapeutic class, Categorized by INN, Enriched with videos

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

**In-app purchases:** none


### SOS Oxygene

[App page](https://appshunter.io/ios/app/sos-oxygene/id956203395)

This medical app provides healthcare professionals with a daily tool for oxygen therapy, respiratory assistance, and artificial nutrition. It offers quick access to unlocking processes, ventilation modes, and parameter settings for various ventilators and CPAP machines, with downloadable technical sheets. A search function helps locate devices by name, supplier, or type.

**Highlights:** Ventilator and CPAP machine settings, Unlocking processes, Ventilation modes, Parameter adjustments, Downloadable technical sheets, Device search function, Push notifications for updates

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

**In-app purchases:** none


## Frequently asked questions

### Is Guide Zéphir free?

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

### Is SOS Oxygene free?

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

### Do Guide Zéphir or SOS Oxygene have ads?

Neither Guide Zéphir nor SOS Oxygene shows ads.

### Which is updated more often, Guide Zéphir or SOS Oxygene?

Guide Zéphir ships an update every 5 months, and SOS Oxygene every 2 months. Most recently, Guide Zéphir was updated on August 27, 2026 and SOS Oxygene on September 21, 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.*