# Eterna Diagnostics vs Rezet

The clearest difference is update cadence: Eterna Diagnostics at every 2 weeks against Rezet's every 3 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.

Eterna Diagnostics ships an update every 2 weeks, Rezet every 3 months. The most recent releases landed on July 20, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Eterna Diagnostics | Rezet |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 70.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 months |
| Monetization | Freemium | — |
| Size | 112 MB | 40 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Eterna Diagnostics](https://appshunter.io/developer/1723205443) | [Rezet Technologies, Inc.](https://appshunter.io/developer/1723767261) |

## What reviewers say

### 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


### Rezet

[App page](https://appshunter.io/ios/app/rezet/id6475267913)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Eterna Diagnostics free?

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

### Is Rezet free?

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

### Do Eterna Diagnostics or Rezet have ads?

Neither Eterna Diagnostics nor Rezet shows ads.

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

Eterna Diagnostics ships an update every 2 weeks, and Rezet every 3 months. Most recently, Eterna Diagnostics was updated on July 20, 2026 and Rezet on September 17, 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.*