# Function Health vs Zephyrian

The clearest difference is monetization model: Zephyrian at free against Function Health's subscription. Function Health's advantage is ratings volume (25K vs 1) and chart position (#191 vs unranked). On price, rating, update cadence and ads 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 — 4.9 for Function Health against 5.0 for Zephyrian. That said, the two scores are not equally well evidenced: Function Health has 25K ratings behind it against 1, so its average is the more settled of the two.

Function Health ships an update weekly, Zephyrian every 8 days. The most recent releases landed on October 21, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Function Health | Zephyrian |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (25K ratings)](https://appshunter.io/ios/app/function-health/id6471280307/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/zephyrian/id6807819804/reviews)** |
| Number of ratings | **25K** | 1 |
| Positive reviews | 61.8% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 8 days |
| Monetization | Subscription | **Free** |
| Best chart rank | **#191** | — |
| Size | 203 MB | 54 MB |
| Requires iOS | 16.4 | 16.4 |
| Devices | iPhone | iPhone |
| Age rating | 17+ | 12+ |
| Developer | [Function Health](https://appshunter.io/developer/1715014524) | [Zephyrian](https://appshunter.io/developer/6807819806) |

## What reviewers say

### Function Health

[App page](https://appshunter.io/ios/app/function-health/id6471280307)

**Currently charting:** #191 Top Free · Health & Fitness (US App Store)

Take control of your health with comprehensive lab testing, personalized protocols, and AI-powered insights. Understand your body's data, track changes over time, and make informed decisions for long-term wellness. Connect wearables and upload records for a complete health picture.

**Highlights:** 160+ lab tests annually, Personalized health protocols, Private AI Chat for results, Connect health wearables, Advanced MRI & CT scans, Upload health records

**Features:** Apple Wallet

**In-app purchases:** none

**What reviewers like**

- 🚀 Seamless process for blood tests and results
- 📊 Comprehensive health insights and tracking
- 🧠 Helpful clinician notes and recommendations
- 👍 User-friendly and visually appealing app
- 💰 Affordable compared to other options

**What reviewers complain about**

- 🔍 Lack of communication and support responsiveness
- 🐛 Some bugs and usability issues in the app

**Reported bugs**

- App sometimes redirects back to the home screen when trying to view results
- Occasional typos and formatting issues in the app

**Requested features**

- More customization options in the app settings
- Ability to print or export test results and recommendations
- Specific supplement recommendations rather than broad suggestions


### Zephyrian

[App page](https://appshunter.io/ios/app/zephyrian/id6807819804)

This app helps you track your daily softgel intake and progress with a simple one-tap logging system. Set personalized reminders, store progress photos privately, and follow your deliveries. Access scientific studies and customer results to understand your journey.

**Highlights:** Daily softgel logging, Progress tracking with calendar, Customizable reminders, Private photo journal, Order tracking, Access to studies and timelines

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

**In-app purchases:** none


## Frequently asked questions

### Is Function Health free?

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

### Is Zephyrian free?

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

### Which has better reviews, Function Health or Zephyrian?

Zephyrian is rated higher. Function Health averages 4.9 out of 5 from 25K ratings, while Zephyrian averages 5.0 from 1 ratings.

### Do Function Health or Zephyrian have ads?

Neither Function Health nor Zephyrian shows ads.

### Which is updated more often, Function Health or Zephyrian?

Function Health ships an update weekly, and Zephyrian every 8 days. Most recently, Function Health was updated on October 21, 2026 and Zephyrian on October 8, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*