# Zest vs BioTrace

The clearest difference is in-app purchases: Zest at none against BioTrace's 4. Zest also leads on update cadence (every 3 weeks vs every 6 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. BioTrace sells 4 in-app purchases, starting at $14.99 per month. Zest asks for nothing beyond the download.

Zest ships an update every 3 weeks, BioTrace every 6 months. The most recent releases landed on October 10, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Zest | BioTrace |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/zest-longevity/id6639614937/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 6 months |
| Monetization | Free | — |
| Size | 23 MB | 64 MB |
| Requires iOS | 16 | **15.1** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 12+ |
| Developer | [Zest Longevity LTD](https://appshunter.io/developer/1657646407) | [Kyle Phillips](https://appshunter.io/developer/1798183878) |

## What reviewers say

### Zest

[App page](https://appshunter.io/ios/app/zest-longevity/id6639614937)

Discover your body's internal age and receive personalized insights to slow your aging rate. This app uses at-home tests and machine learning to analyze health metrics like cardiovascular fitness and cognitive function, providing tailored recommendations for improvement.

**Highlights:** Measure Functional Age, At-home health testing, Personalized health insights, Machine learning analysis, Tailored recommendations, Track aging metrics

**In-app purchases:** none


### BioTrace

[App page](https://appshunter.io/ios/app/biotrace-longevity-tracker/id6759473428)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| BioTrace Standard Monthly | $14.99 | per month |
| Optimized Monthly | $24.99 | per month |
| BioTrace Standard Yearly | $119.00 | per year |
| BioTrace Optimized Yearly | $219.00 | per year |


## Frequently asked questions

### Is Zest free?

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

### Is BioTrace free?

BioTrace is free to download, with in-app purchases available.

### Do Zest or BioTrace have ads?

Neither Zest nor BioTrace shows ads.

### Which is updated more often, Zest or BioTrace?

Zest ships an update every 3 weeks, and BioTrace every 6 months. Most recently, Zest was updated on October 10, 2026 and BioTrace on October 2, 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.*