# Biow vs Eterna Diagnostics

The clearest difference is update cadence: Eterna Diagnostics at every 2 weeks against Biow's every 3 months. Eterna Diagnostics also leads on iOS requirement (14.0 vs 16.0). Biow's advantage is monetization model (free vs freemium). 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.

Biow ships an update every 3 months, Eterna Diagnostics every 2 weeks. The most recent releases landed on September 10, 2026 and July 20, 2026 respectively.

## The numbers

| Metric | Biow | Eterna Diagnostics |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/biow/id1472171569/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | — | 70.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Monetization | **Free** | Freemium |
| Size | 64 MB | 112 MB |
| Requires iOS | 16.0 | **14.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [DATA MONITORING S.L.](https://appshunter.io/developer/1361669407) | [Eterna Diagnostics](https://appshunter.io/developer/1723205443) |

## What reviewers say

### Biow

[App page](https://appshunter.io/ios/app/biow/id1472171569)

This app provides a cellular rest and oxygenation unit that purifies the air you breathe during sleep. It eliminates allergens, toxins, viruses, and bacteria, improving respiratory capacity and circulation for better sleep and reduced signs of aging.

**Highlights:** Cellular rest and oxygenation, Air nanofiltration, Respiratory sweep treatment, Eliminates allergens and toxins, Reduces snoring and apneas, Improves circulation

**Features:** macOS Compatibility

**In-app purchases:** none


### Eterna Diagnostics

[App page](https://appshunter.io/ios/app/eterna-diagnostics/id6475050723)

Measure your biological age in real-time and understand how your habits impact your health. This app uses smartwatch biometric data and advanced biomarker analysis to provide actionable insights for improving cardiovascular, metabolic, hormonal, and bone health. Identify areas for improvement, optimize cognitive and physical performance, and work towards preventing chronic diseases.

**Highlights:** Real-time aging rate analysis from wearables, Advanced biomarker health panels, Population comparative insights, Intuitive habit tracking (sleep, stress, activity), Expert video tips on preventive health

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

**In-app purchases:** none


## Frequently asked questions

### Is Biow free?

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

### Is Eterna Diagnostics free?

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

### Do Biow or Eterna Diagnostics have ads?

Neither Biow nor Eterna Diagnostics shows ads.

### Which is updated more often, Biow or Eterna Diagnostics?

Biow ships an update every 3 months, and Eterna Diagnostics every 2 weeks. Most recently, Biow was updated on September 10, 2026 and Eterna Diagnostics on July 20, 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.*