# Water Assist vs Function Health

The clearest difference is rating: Function Health at 4.9 against Water Assist's 2.5. Function Health also leads on review sentiment (62% vs 33%) and ratings volume (25K vs 11). Water Assist'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 2.5. That said, the two scores are not equally well evidenced: Function Health has 25K ratings behind it against 11, so its average is the more settled of the two. Written reviews point the same way: 33% of Water Assist's written reviews are positive against 62% of Function Health's.

Water Assist ships an update every 3 weeks, Function Health weekly. The most recent releases landed on October 25, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Water Assist | Function Health |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.5 (11 ratings)](https://appshunter.io/ios/app/water-assist/id6465912034/reviews) | **[4.9 (25K ratings)](https://appshunter.io/ios/app/function-health/id6471280307/reviews)** |
| Number of ratings | 11 | **25K** |
| Positive reviews | 33.3% of reviews | **61.5% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | **Free** | Subscription |
| Size | 120 MB | 205 MB |
| Requires iOS | **16.0** | 16.4 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [ECOLIFE INTERNATIONAL, INC](https://appshunter.io/developer/1706800901) | [Function Health](https://appshunter.io/developer/1715014524) |

## What reviewers say

### Water Assist

[App page](https://appshunter.io/ios/app/water-assist/id6465912034)

Manage your Waterdrop brand water purification devices, track filter lifespan, and receive timely replacement reminders. Access customer support and check U.S. water quality reports for safe drinking water.

**Highlights:** Manage Waterdrop devices, Track filter lifespan, Water replacement reminders, Customer support access, U.S. water quality check, Water quality reports

**Features:** Siri integration

**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 Water Assist free?

Water Assist 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, Water Assist or Function Health?

Function Health is rated higher. Water Assist averages 2.5 out of 5 from 11 ratings, while Function Health averages 4.9 from 25K ratings.

### Do Water Assist or Function Health have ads?

Neither Water Assist nor Function Health shows ads.

### Which is updated more often, Water Assist or Function Health?

Water Assist ships an update every 3 weeks, and Function Health weekly. Most recently, Water Assist was updated on October 25, 2026 and Function Health on October 31, 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.*