# Function Health vs Oxiline

The clearest difference is review sentiment: Function Health at 62% against Oxiline's 14%. Function Health also leads on rating (4.9 vs 4.1) and update cadence (weekly vs monthly). Oxiline's advantage is monetization model (free vs subscription). On price, ads, in-app purchases and device support there is nothing between them.

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

Function Health holds the better App Store score, 4.9 against 4.1. Both are backed by a comparable volume of ratings — 25K and 6.3K respectively. Written reviews point the same way: 62% of Function Health's written reviews are positive against 14% of Oxiline's.

Function Health ships an update weekly, Oxiline monthly. The most recent releases landed on September 25, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Function Health | Oxiline |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (25K ratings)](https://appshunter.io/ios/app/function-health/id6471280307/reviews)** | [4.1 (6.3K ratings)](https://appshunter.io/ios/app/oxiline/id6471374567/reviews) |
| Number of ratings | **25K** | 6.3K |
| Positive reviews | **61.9% of reviews** | 13.5% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Monthly |
| Monetization | Subscription | **Free** |
| Size | 201 MB | 102 MB |
| Requires iOS | 16.4 | 16.4 |
| Devices | iPhone | iPhone |
| Age rating | 17+ | 12+ |
| Developer | [Function Health](https://appshunter.io/developer/1715014524) | [Oxiline LLC](https://appshunter.io/developer/1715190779) |

## 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


### Oxiline

[App page](https://appshunter.io/ios/app/oxiline/id6471374567)

This app connects to health devices to visualize, track, and export your health measurements. It provides real-time data visualization and a comprehensive overview of your health metrics, helping you monitor progress and share data with healthcare providers.

**Highlights:** Bluetooth device integration, Real-time data visualization, Comprehensive health overview, Data export for healthcare providers, Progress tracking over time, Secure and private data storage

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

**In-app purchases:** none

**What reviewers like**

- 🚀 Accurate device
- 👍 Easy to use
- 💡 Helpful charting and data logging

**What reviewers complain about**

- 🐛 Connectivity issues with app
- 🐛 Unreliable data sync
- 🐛 Buggy app performance
- 🔒 Lack of Apple Health integration

**Reported bugs**

- App crashes frequently
- Bluetooth connection drops unexpectedly
- Historical data not syncing to app
- Incorrect time zone and date display in charts

**Requested features**

- Add ability to switch between mg/dL and mmol/L
- Allow adding custom notes to readings
- Improve app UI and navigation
- Enhance data export and sharing options


## Frequently asked questions

### Is Function Health free?

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

### Is Oxiline free?

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

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

Function Health is rated higher. Function Health averages 4.9 out of 5 from 25K ratings, while Oxiline averages 4.1 from 6.3K ratings.

### Do Function Health or Oxiline have ads?

Neither Function Health nor Oxiline shows ads.

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

Function Health ships an update weekly, and Oxiline monthly. Most recently, Function Health was updated on September 25, 2026 and Oxiline on September 24, 2026.

---

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