Function Health vs Oasis
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Function Health
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.
- 160+ lab tests annually
- Personalized health protocols
- Private AI Chat for results
- Connect health wearables
- Advanced MRI & CT scans
- Upload health records
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Function membership helps you take control of your health with 160+ lab tests each year, personalized Protocols, and Private AI Chat—all backed by advanced science and your real data. Built with top doctors, Function gives you the power to understand your body, track how it evolves, and make meaningful change. NOW AVAILABLE: HOME OR OFFICE BLOOD DRAWS Schedule a concierge blood draw at your home or office. A licensed specialist comes to you and completes your blood draw in under 20 minutes. Available in select locations. 160+ LAB TESTS Membership includes testing for your heart, hormones, thyroid, liver, kidneys, toxins, nutrients, inflammation, autoimmunity, immunity and more. ADVANCED MRI & CT SCANS Detect early signs of cancer and hundreds of other potential conditions with the option to purchase advanced imaging for your brain, pancreas, liver, spine, ovaries, prostate, heart and much more. PRIVATE AI CHAT Ask questions about your results, identify meaningful patterns, and figure out where to focus next, with Private AI Chat—built in partnership with top clinicians. CONNECT WEARABLES Connect Apple Health and other health devices and wearables to see how your activity, sleep, and daily habits affect your lab test results and long-term health. PROTOCOLS Translate your lab results, scans and health history into clear, evidence-based plans for nutrition, activity, and supplements—all customizable to your goals and preferences. UPLOAD HEALTH RECORDS Upload past lab test results, scans, and other medical records for a more complete view of your health, all in one secure place. PROGRESS YOU CAN SEE Twice-yearly and On-Demand testing helps you track your results over time, monitor for early signs of disease, and identify where to focus next. ADVANCED LAB TESTS Membership includes 160+ lab tests, plus the option to purchase advanced On-Demand tests for: - Detection of 50+ cancers - Alzheimer’s risk detection - MTHFR gene variants - Advanced MRI and CT scans starting at $365 - Food allergies and sensitivities - …and much more ACCESSIBILITY What could cost as much as $15,000 on your own is included with membership for just $365/year. Lab testing is available at over 2,000 lab locations across the US, with no insurance needed. SECURITY Function was built for privacy and security. Function is built to HIPAA standards. Your information is secure. How it works: 1. Join Function and schedule your first set of lab tests. 2. Get your results and personalized Protocols. Ask questions with your Private AI Chat. 3. See your progress with 60+ lab tests at your Mid-Year Test. 4. Purchase MRI or CT scans and other advanced On-Demand Tests any time. DISCLAIMER Function Health is a technology company and not a laboratory or medical provider. All laboratory and medical services are provided by independent third parties. Function Health does not offer medical advice, laboratory services, a diagnosis, medical treatment, or any form of a medical opinion; its services are not a substitute for medical care, medical advice, and/or a detailed discussion with a physician or other licensed provider. If you have any questions regarding any laboratory results or any other information that you access through Function Health, you should contact a physician or other licensed provider. All material, information, data, and content that Function Health provides is strictly for general information purposes. For additional important information: https:// www.functionhealth.com/terms-of-service.
Oasis
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.
- Independent lab testing
- Transparent data
- Unbiased product ratings
- Personalized recommendations
- Purity and safety insights
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The #1 trusted and original platform for finding what's healthy. Independent lab tests and top ranking waters, filters, supplements, foods and more! We live in a world of products that poison us, brands that hide the truth, and governments that fail to safeguard our health. Oasis is here to change that. Starting with water, filters, and air purifiers, we help you find the healthiest products through independent lab testing and transparent data. Why Oasis? - Unbiased & Transparent: We charge to fund expensive lab testing and remain independent—no ads, no hidden agendas. - Lab-Tested Ratings: Get trusted insights into product purity, safety, and environmental impact. - Personalized Recommendations: Tailored suggestions based on your health and lifestyle goals. Subscription plans: • Free: access all lab results and reports • Oasis Pro: $47 /yr: top rankings, advanced features Funds from subscriptions go to further research and help us remain independent. Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy policy: https://www.oasiswater.app/privacy-policy
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Function Health | Oasis |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (25K ratings) — better | 4.8 (13K ratings) |
| Positive reviews | 61.9% of reviews — better | 19.8% of reviews |
| Number of ratings | 25K — better | 13K |
| Update frequency | Weekly | Every 3 days — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Subscription | Freemium — better |
| Devices | iPhone | iPhone |
| Requires iOS | 16.4 — better | 18.0 |
| Further details — not scored | ||
| Size | 201 MB | 79 MB |
| Age rating | 17+ | 4+ |
| Developer | Function Health | Cormac Hayden |
Customer experience
Function Health
Oasis
User reviews
Function Health
From 25K App Store ratingsWhat we love
- 🚀 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
Room to improve
- 🔍 Lack of communication and support responsiveness
- 🐛 Some bugs and usability issues in the app
Oasis
From 13K App Store ratingsWhat we love
- 🙌 Helpful water quality information
- 🤝 Promotes health awareness
- 💡 Innovative concept
Room to improve
- 🔒 Mandatory sign-up required
- 💰 Expensive subscription model
- 🐛 Buggy and glitchy app
- ⚠️ Inaccurate or inconsistent ratings
Bugs and requests
Function Health
Reported bugs
2 issues- App sometimes redirects back to the home screen when trying to view results
- Occasional typos and formatting issues in the app
Requested features
3 requests- More customization options in the app settings
- Ability to print or export test results and recommendations
- Specific supplement recommendations rather than broad suggestions
Oasis
Reported bugs
3 issues- App freezes or fails to load
- Login/sign-in issues
- Scrolling and navigation problems
Requested features
4 requests- Ability to browse without signing up
- More transparent rating system
- Improved search and filtering options
- Integration with water quality databases
In-app purchases
Function Health
No in-app purchases
Oasis
- Oasis Weekly$4.997 Days
- Oasis Pro$7.991 Month
- Oasis Pro3 Days trial$12.991 Month
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- Oasis Pro3 Days trial$29.991 Year
- Oasis Pro (annual)3 Days trial$47.001 Year
- Oasis Pro (annual)3 Days trial$59.991 Year
- Oasis Pro (annual)3 Days trial$69.991 Year









