# Zest vs FeRRUM Athletic Co.

The clearest difference is ads: Zest at none against FeRRUM Athletic Co.'s shown. Zest also leads on monetization model (free vs ad-supported). FeRRUM Athletic Co.'s advantage is ratings volume (3 vs 1). On price, rating, update cadence and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for Zest against 5.0 for FeRRUM Athletic Co.. Both are backed by a comparable volume of ratings — 1 and 3 respectively.

Zest ships an update every 3 weeks, FeRRUM Athletic Co. fortnightly. The most recent releases landed on September 8, 2026 and June 11, 2026 respectively.

## The numbers

| Metric | Zest | FeRRUM Athletic Co. |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/zest-longevity/id6639614937/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/ferrum-athletic-co/id6753950729/reviews) |
| Number of ratings | 1 | **3** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Fortnightly** |
| Monetization | **Free** | Ad-supported |
| Size | 23 MB | 95 MB |
| Requires iOS | 16 | **15** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Zest Longevity LTD](https://appshunter.io/developer/1657646407) | [Element 26 Fitness, LLC](https://appshunter.io/developer/1847682891) |

## 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


### FeRRUM Athletic Co.

[App page](https://appshunter.io/ios/app/ferrum-athletic-co/id6753950729)

Manage your fitness club membership with ease. Reserve spots in classes, sign up for gym events, and update your account details, including payment information and profile pictures.

**Highlights:** Class reservations, Gym event sign-ups, Account management, Profile picture updates, Payment information management

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is Zest free?

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

### Is FeRRUM Athletic Co. free?

FeRRUM Athletic Co. is free to download, with no in-app purchases.

### Which has better reviews, Zest or FeRRUM Athletic Co.?

Zest and FeRRUM Athletic Co. are both rated 5.0 out of 5 on the App Store, from 1 and 3 ratings respectively.

### Do Zest or FeRRUM Athletic Co. have ads?

FeRRUM Athletic Co. shows ads; Zest does not.

### Which is updated more often, Zest or FeRRUM Athletic Co.?

Zest ships an update every 3 weeks, and FeRRUM Athletic Co. fortnightly. Most recently, Zest was updated on September 8, 2026 and FeRRUM Athletic Co. on June 11, 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.*