# Function Health vs PepOS

Function Health and PepOS both sit at 4.9 stars, but that hides the real split: 100% of PepOS's written reviews are positive against 62% of Function Health's. PepOS also leads on device support (3 vs 1). Function Health's advantage is in-app purchases (none vs 2) and ratings volume (25K vs 1). On price, rating, ads and iOS requirement there is nothing between them.

Both are free to download. PepOS sells 2 in-app purchases, starting at $9.99 per month. Function Health asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.9 for Function Health against 5.0 for PepOS. 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. Written reviews are what separate them: 62% of Function Health's written reviews are positive against 100% of PepOS's.

Function Health ships an update weekly, PepOS fortnightly. The most recent releases landed on October 17, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Function Health | PepOS |
| --- | --- | --- |
| 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/pepos-peptide-tracker/id6763047593/reviews)** |
| Number of ratings | **25K** | 1 |
| Positive reviews | 61.8% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Fortnightly |
| Monetization | Subscription | **Freemium** |
| Size | 203 MB | 29 MB |
| Requires iOS | 16.4 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 17+ | 17+ |
| Developer | [Function Health](https://appshunter.io/developer/1715014524) | [DOHO DIGITAL, LLC](https://appshunter.io/developer/1895136742) |

## What reviewers say

### Function Health

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

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


### PepOS

[App page](https://appshunter.io/ios/app/pepos-peptide-tracker/id6763047593)

Track peptide doses, build custom protocols, and monitor your body's response with AI insights. Integrates with Apple Health for comprehensive optimization tracking. Not medical advice.

**Highlights:** AI peptide intelligence, Protocol builder, Apple Health integration, Vial inventory tracking, Injection site rotation, Progress tracking, AI insights and reports

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PepOS Intelligence | $9.99 | per month |
| PepOS Intelligence | $59.99 | per year |


## Frequently asked questions

### Is Function Health free?

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

### Is PepOS free?

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

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

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

### Do Function Health or PepOS have ads?

Neither Function Health nor PepOS shows ads.

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

Function Health ships an update weekly, and PepOS fortnightly. Most recently, Function Health was updated on October 17, 2026 and PepOS on October 15, 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.*