# Zest: Longevity — Live healthier for longer

> App to measure and improve functional age using at-home health tests. (iPhone/iPad app by Zest Longevity LTD.)

- Source: https://appshunter.io/ios/app/zest-longevity/id6639614937 (this page in markdown: same URL + `.md`)
- Developer: [Zest Longevity LTD](https://appshunter.io/developer/1657646407)
- Category: Health & Fitness
- Price: Free
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 17+
- Requires: iOS 16 · 23 MB
- Languages: English
- Released: 2024-08-28
- Data updated: 2026-06-10
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/zest-longevity/id6639614937/reviews.md

## What is Zest?

Ever wondered how old your body actually is on the INSIDE?

Discover your Functional Age with Zest.

For the first time in history, we have the tools to address aging at its core, and the science to help you to slow your rate of aging. A big part of this is tracking your body’s age on the inside and working to improve your metrics – which is where Zest comes in.

Our app and simple at-home test dive deeply into your health, measuring everything from cardiovascular fitness, metabolic health, cognitive function and hormonal health. We use cutting-edge machine learning technology to analyze this data and give you an incredibly accurate measure of your Functional Age (your body’s age on the inside) which you can track and improve over time. Unlike chronological age, which simply counts years, functional age takes a holistic approach and looks at all of your body systems.

How it works:
  1. Unbox your at-home test: A simple finger prick and a few quick questions to get started.
  2. Mail it back: We'll analyze your blood and digital biomarkers to reveal your Functional Age.
  3. Results in-App: Dive into personalized insights about your body's performance.
  4. Optimize your health: Get tailored recommendations to keep improving your functional age over time.
 
Zest was built by a team of medical doctors, longevity scientists and researchers, and backed up by 100+ clinical trials. We are constantly updating and evaluating our recommendations to ensure we are consistent with the latest research.

Are you ready to feel younger for longer? Let's redefine aging together.

This product is not intended for diagnostic or treatment purposes and does not constitute healthcare advice. It is designed for healthy individuals to better understand their bodies and avoid future diseases. If you are concerned about any of your results in this app please contact your healthcare provider.

## Key features

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


## Frequently asked questions about Zest

### What is Zest's Functional Age?

Zest's Functional Age measures your body's internal biological age, going beyond chronological age. It analyzes various health metrics to provide a holistic view of your body's performance and aging rate.

### How does Zest measure Functional Age?

Zest uses a simple at-home test involving a finger prick and quick questions. This data, along with digital biomarkers, is analyzed using machine learning to determine your Functional Age.

### What kind of health metrics does Zest analyze?

Zest analyzes metrics including cardiovascular fitness, metabolic health, cognitive function, and hormonal health to provide a comprehensive understanding of your body's internal age.

### Is Zest a medical device?

No, Zest is not intended for diagnostic or treatment purposes and does not constitute healthcare advice. It is designed for healthy individuals to better understand their bodies and prevent future diseases.

### Who developed Zest?

Zest was developed by a team of medical doctors, longevity scientists, and researchers, and is backed by over 100 clinical trials.

### How often is Zest updated?

Zest is updated frequently, with the latest version being 3.3.2 released on April 27, 2025. The team constantly evaluates recommendations based on the latest research.

### What devices does Zest support?

Zest is currently supported on iPhone and iPod devices.

### Does Zest have ads?

No, Zest is ad-free, allowing users to focus on their health insights without interruptions.

## Version history (last 5 releases)

### 3.3.2 — 2025-04-27

This update focuses on improving the user experience. Here's what's new:
- More UX enhancements
Update today and enjoy these latest enhancements!

### 3.3.1 — 2025-04-07

This update focuses on improving the user experience. Here's what's new:
- New Functional Age Kit Store 
- Added filtering options to News section 
- Various UI enhancements 
Update today and enjoy these latest enhancements!

### 3.2.1 — 2025-02-23

This update focuses on improving the user experience. Here's what's new:
- Improved Onboarding experience 
- Repaired a bug that prevented biometric authentication from unlocking 
Update today and enjoy these latest enhancements!

### 3.2.0 — 2025-02-14

In this update: 
- Fixes a bug that could lead to invalid account creation in very specific onboarding situations.
Update today and enjoy these latest enhancements!

### 3.1.8 — 2025-02-11

This update focuses on updating the plan recommendations and news experiences. Here's what's new: 
- Updated design of news page
- Improved interaction with plan recommendations 
Update today and enjoy these latest enhancements!

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| App | Rating | Price | Category |
| --- | --- | --- | --- |
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| [HALT 360](https://appshunter.io/ios/app/halt-360/id6462537199) | — | Free | Health & Fitness |
| [Pacing Quest](https://appshunter.io/ios/app/pacing-quest/id6499503099) | 5.0 (1) | Free | Health & Fitness |
| [Natural Longevity](https://appshunter.io/ios/app/natural-longevity/id1524860329) | — | Free | Health & Fitness |
| [Longevity Health](https://appshunter.io/ios/app/longevity-health/id6737564731) | — | Free | Health & Fitness |
| [Oregon Longevity Project](https://appshunter.io/ios/app/oregon-longevity-project/id1575395300) | 5.0 (1) | Free | Health & Fitness |

## More apps by Zest Longevity LTD

- [Zest - Longevity](https://appshunter.io/ios/app/zest-longevity/id6444888216)
- [Zest Research](https://appshunter.io/ios/app/zest-research/id6745491703)

All apps by Zest Longevity LTD: https://appshunter.io/developer/1657646407

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*