# Function Health vs BIDSleep

The clearest difference is rating: Function Health at 4.9 against BIDSleep's 2.0. Function Health also leads on review sentiment (62% vs 25%) and ratings volume (25K vs 4). BIDSleep'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 2.0. 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. Written reviews point the same way: 62% of Function Health's written reviews are positive against 25% of BIDSleep's.

## The numbers

| Metric | Function Health | BIDSleep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (25K ratings)](https://appshunter.io/ios/app/function-health/id6471280307/reviews)** | [2.0 (4 ratings)](https://appshunter.io/ios/app/bidsleep/id6747012248/reviews) |
| Number of ratings | **25K** | 4 |
| Positive reviews | **61.9% of reviews** | 25.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Weekly | — |
| Monetization | Subscription | **Free** |
| Size | 199 MB | 3 MB |
| Requires iOS | 16.4 | **16.0** |
| Devices | iPhone | **iPhone, Apple Watch** |
| Age rating | 17+ | 4+ |
| Developer | [Function Health](https://appshunter.io/developer/1715014524) | [Joyita Dutta](https://appshunter.io/developer/1819386876) |

## 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


### BIDSleep

[App page](https://appshunter.io/ios/app/bidsleep/id6747012248)

This app records heart rate, blood oxygen, and motion data from your Apple Watch for personal wellness tracking. It does not offer analysis or diagnostics, focusing solely on data collection and export.

**Highlights:** Heart rate recording, Blood oxygen (SpO₂) logging, Motion data collection, Optional sleep stage tracking, Data export, Personal self-monitoring

**In-app purchases:** none


## Frequently asked questions

### Is Function Health free?

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

### Is BIDSleep free?

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

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

Function Health is rated higher. Function Health averages 4.9 out of 5 from 25K ratings, while BIDSleep averages 2.0 from 4 ratings.

### Do Function Health or BIDSleep have ads?

Neither Function Health nor BIDSleep shows ads.

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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.*