# Function Health vs 8bottle

Function Health and 8bottle both sit at 4.9 stars, but that hides the real split: 100% of 8bottle's written reviews are positive against 62% of Function Health's. 8bottle also leads on monetization model (free vs subscription) and iOS requirement (14.0 vs 16.4). Function Health's advantage is ratings volume (25K vs 8) and update cadence (weekly vs fortnightly). 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 — 4.9 for Function Health against 5.0 for 8bottle. That said, the two scores are not equally well evidenced: Function Health has 25K ratings behind it against 8, 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 8bottle's.

Function Health ships an update weekly, 8bottle fortnightly. The most recent releases landed on October 16, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Function Health | 8bottle |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (25K ratings)](https://appshunter.io/ios/app/function-health/id6471280307/reviews) | **[5.0 (8 ratings)](https://appshunter.io/ios/app/8bottle/id6503256580/reviews)** |
| Number of ratings | **25K** | 8 |
| Positive reviews | 62.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Fortnightly |
| Monetization | Subscription | **Free** |
| Best chart rank | **#205** | — |
| Size | 202 MB | 49 MB |
| Requires iOS | 16.4 | **14.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Function Health](https://appshunter.io/developer/1715014524) | [8bottle Inc](https://appshunter.io/developer/1604696263) |

## What reviewers say

### Function Health

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

**Currently charting:** #205 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


### 8bottle

[App page](https://appshunter.io/ios/app/8bottle/id6503256580)

Track your water intake and set personalized hydration goals with this smart companion app. It syncs with a smart bottle to provide reminders and motivate you through friendly competition. Your hydration habits also contribute to global water projects.

**Highlights:** Smart hydration tracking, Personalized goal setting, Real-time progress display, Friend competition for motivation, Global water project contributions, Hydration tips and challenges

**In-app purchases:** none


## Frequently asked questions

### Is Function Health free?

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

### Is 8bottle free?

8bottle is free to download, with no in-app purchases.

### Which has better reviews, Function Health or 8bottle?

8bottle is rated higher. Function Health averages 4.9 out of 5 from 25K ratings, while 8bottle averages 5.0 from 8 ratings.

### Do Function Health or 8bottle have ads?

Neither Function Health nor 8bottle shows ads.

### Which is updated more often, Function Health or 8bottle?

Function Health ships an update weekly, and 8bottle fortnightly. Most recently, Function Health was updated on October 16, 2026 and 8bottle on October 3, 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.*