# FEI SOS vs ESTESIA

The clearest difference is update cadence: FEI SOS at every 6 weeks against ESTESIA's every 15 months. 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.

FEI SOS ships an update every 6 weeks, ESTESIA every 15 months. The most recent releases landed on October 7, 2026 and November 27, 2025 respectively.

## The numbers

| Metric | FEI SOS | ESTESIA |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 80.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 15 months |
| Monetization | Free | — |
| Size | 5 MB | 58 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Mattia Dorigo](https://appshunter.io/developer/892085024) | [Roberto Papa](https://appshunter.io/developer/924984493) |

## What reviewers say

### FEI SOS

[App page](https://appshunter.io/ios/app/fei-sos/id1406135280)

Access medical and clinical data stored within wearable products like bracelets, adhesives, cards, helmets, and jackets. This application provides a digital gateway to information linked to physical items.

**Highlights:** View medical information, Access clinical data, Connects to wearables, Supports bracelets, cards, helmets, jackets

**Features:** macOS Compatibility

**In-app purchases:** none


### ESTESIA

[App page](https://appshunter.io/ios/app/estesia/id1556075712)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is FEI SOS free?

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

### Is ESTESIA free?

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

### Do FEI SOS or ESTESIA have ads?

Neither FEI SOS nor ESTESIA shows ads.

### Which is updated more often, FEI SOS or ESTESIA?

FEI SOS ships an update every 6 weeks, and ESTESIA every 15 months. Most recently, FEI SOS was updated on October 7, 2026 and ESTESIA on November 27, 2025.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*