# Upgrade Performance Institute vs Function Health

The clearest difference is monetization model: Upgrade Performance Institute at free against Function Health's subscription. Upgrade Performance Institute also leads on device support (3 vs 1). Function Health's advantage is update cadence (weekly vs every 8 months) and ratings volume (25K vs 4). On price, rating, ads 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 Upgrade Performance Institute against 4.9 for Function Health. That said, the two scores are not equally well evidenced: Function Health has 25K ratings behind it against 4, so its average is the more settled of the two.

Upgrade Performance Institute ships an update every 8 months, Function Health weekly. The most recent releases landed on September 30, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Upgrade Performance Institute | Function Health |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/upgrade-performance-institute/id1581177931/reviews)** | [4.9 (25K ratings)](https://appshunter.io/ios/app/function-health/id6471280307/reviews) |
| Number of ratings | 4 | **25K** |
| Positive reviews | — | 61.8% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Weekly** |
| Monetization | **Free** | Subscription |
| Size | 173 MB | 203 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPod, Apple Watch** | iPhone |
| Age rating | 12+ | 17+ |
| Developer | [UPGRADE Performance Institute, LLC](https://appshunter.io/developer/1581177933) | [Function Health](https://appshunter.io/developer/1715014524) |

## What reviewers say

### Upgrade Performance Institute

[App page](https://appshunter.io/ios/app/upgrade-performance-institute/id1581177931)

Monitor workouts, track progress, and achieve fitness goals with personalized plans and engaging challenges. Manage classes and book sessions to stay motivated on your fitness journey.

**Highlights:** Workout tracking, Personalized training plans, Activity level milestones, Fun fitness challenges, Class scheduling and booking, HealthKit integration

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Upgrade Performance Institute free?

Upgrade Performance Institute is free to download, with no in-app purchases.

### Is Function Health free?

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

### Which has better reviews, Upgrade Performance Institute or Function Health?

Upgrade Performance Institute is rated higher. Upgrade Performance Institute averages 5.0 out of 5 from 4 ratings, while Function Health averages 4.9 from 25K ratings.

### Do Upgrade Performance Institute or Function Health have ads?

Neither Upgrade Performance Institute nor Function Health shows ads.

### Which is updated more often, Upgrade Performance Institute or Function Health?

Upgrade Performance Institute ships an update every 8 months, and Function Health weekly. Most recently, Upgrade Performance Institute was updated on September 30, 2026 and Function Health on October 25, 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.*