# Function Health vs Oasis

Function Health and Oasis both sit at 4.9 stars, but that hides the real split: 62% of Function Health's written reviews are positive against 20% of Oasis's. Function Health also leads on in-app purchases (none vs 7) and ads (none vs shown). On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. Oasis sells 7 in-app purchases, starting at $4.99 per 7 days. Function Health asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.9 for Function Health against 4.8 for Oasis. Both are backed by a comparable volume of ratings — 25K and 13K respectively. Written reviews are what separate them: 62% of Function Health's written reviews are positive against 20% of Oasis's.

Function Health ships an update weekly, Oasis every 3 days. The most recent releases landed on September 30, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Function Health | Oasis |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (25K ratings)](https://appshunter.io/ios/app/function-health/id6471280307/reviews)** | [4.8 (13K ratings)](https://appshunter.io/ios/app/oasis-whats-inside/id6499478532/reviews) |
| Number of ratings | **25K** | 13K |
| Positive reviews | **61.9% of reviews** | 19.8% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Weekly | **Every 3 days** |
| Monetization | Subscription | **Freemium** |
| Size | 201 MB | 79 MB |
| Requires iOS | **16.4** | 18.0 |
| Devices | iPhone | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Function Health](https://appshunter.io/developer/1715014524) | [Cormac Hayden](https://appshunter.io/developer/1743603581) |

## 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


### Oasis

[App page](https://appshunter.io/ios/app/oasis-whats-inside/id6499478532)

Discover healthier products with independent lab testing. This platform provides transparent data and unbiased ratings for items like water, filters, and supplements, helping you make informed choices for your well-being.

**Highlights:** Independent lab testing, Transparent data, Unbiased product ratings, Personalized recommendations, Purity and safety insights

**Features:** macOS Compatibility

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Oasis Weekly | $4.99 | per 7 days |
| Oasis Pro | $7.99 | per month |
| Oasis Pro | $12.99 | per month |
| Oasis Pro | $29.99 | per year |
| Oasis Pro (annual) | $47.00 | per year |
| Oasis Pro (annual) | $59.99 | per year |
| Oasis Pro (annual) | $69.99 | per year |

**What reviewers like**

- 🙌 Helpful water quality information
- 🤝 Promotes health awareness
- 💡 Innovative concept

**What reviewers complain about**

- 🔒 Mandatory sign-up required
- 💰 Expensive subscription model
- 🐛 Buggy and glitchy app
- ⚠️ Inaccurate or inconsistent ratings

**Reported bugs**

- App freezes or fails to load
- Login/sign-in issues
- Scrolling and navigation problems

**Requested features**

- Ability to browse without signing up
- More transparent rating system
- Improved search and filtering options
- Integration with water quality databases


## Frequently asked questions

### Is Function Health free?

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

### Is Oasis free?

Oasis is free to download, with in-app purchases available.

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

Function Health is rated higher. Function Health averages 4.9 out of 5 from 25K ratings, while Oasis averages 4.8 from 13K ratings.

### Do Function Health or Oasis have ads?

Oasis shows ads; Function Health does not.

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

Function Health ships an update weekly, and Oasis every 3 days. Most recently, Function Health was updated on September 30, 2026 and Oasis on September 29, 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.*