Comparison

Function Health vs Dreamside

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Function Health

Gain deep insights into your health with advanced lab testing, personalized protocols, and AI-powered chat. Understand your body's evolution and make informed changes with data-backed guidance. Includes options for advanced imaging and convenient blood draws.

Highlights
  • 160+ lab tests annually
  • Personalized health protocols
  • Private AI Chat for results
  • Advanced MRI & CT scan options
  • Home or office blood draws
  • Connect wearables
  • Upload health records
Features
Read full description

Function membership helps you take control of your health with 160+ lab tests each year, personalized Protocols, and Private AI Chat powered by Medical Intelligence—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. MEDICAL INTELLIGENCE Built with leading medical scientists, Function’s proprietary model brings together your health history and insights from a large population to help you better understand your health and find steps you can take today to support your health over time. PRIVATE AI CHAT Ask questions about your results, identify meaningful patterns, and figure out where to focus next, with Private AI Chat—powered by Medical Intelligence and 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.

About

Dreamside

Capture your dreams in a journal, transform them into AI art, and gain insights into your sleep patterns. Build personalized bedtime routines to improve your sleep quality.

Highlights
  • Dream journaling
  • AI dream artwork generation
  • Sleep data analysis
  • Bedtime routine builder
  • Apple Health integration
  • Dream history browsing
Read full description

Dreamside is your personal sleep and dream companion — a beautiful journal for capturing dreams, building bedtime routines, and discovering what your sleep patterns reveal. DREAM JOURNAL Log your dreams each morning while the details are fresh. Record the narrative, emotions, and vividness of each dream. Browse your entire dream history in the gallery. AI DREAM ARTWORK Turn your dreams into stunning watercolor paintings with one tap. Each image is uniquely generated from your dream's narrative by AI. SLEEP INSIGHTS Dreamside connects to Apple Health to pull your sleep data — duration, deep sleep, REM, HRV, heart rate, and wrist temperature. Its correlation engine reveals hidden patterns between your sleep quality and your dreams over time. BEDTIME ROUTINES Build a personalized wind-down routine with timed steps. Start a timer, track your streak, and build the habit of a consistent bedtime. FREE TO TRY Every account includes 5 AI images and 15 interpretations at no cost. Subscribe for more. DREAMER — $4.99/month 30 AI images · 500 interpretations per month LUCID DREAMER — $9.99/month 90 AI images · 1,500 interpretations per month Requires iPhone with iOS 17 or later. Sleep insights require Apple Watch or another Apple Health-compatible device. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://caseylester-dev.github.io/Dreamside/privacy

Screenshots

Function Health4 screens
Dreamside4 screens

Verdict

The call

The clearest difference is in-app purchases: Function Health at none against Dreamside's 2. Function Health also leads on ratings volume (25K vs 1). On price, rating, ads and device support 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Dreamside sells 2 in-app purchases, starting at $4.99 per month. Function Health asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.9 for Function Health against 5.0 for Dreamside. That said, the two scores are not equally well evidenced: Function Health has 25K ratings behind it against 1, so its average is the more settled of the two.

Scorecard3 real differences · 7 level
Function Health versus Dreamside: the parameters behind the verdict, then further details
ParameterFunction HealthDreamside
PriceFreeFree
Rating4.9 (25K ratings)5.0 (1 ratings) — better
Positive reviews61.5% of reviews—
Number of ratings25K — better1
Update frequencyWeekly—
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
DevicesiPhoneiPhone
Requires iOS16.4 — better17.0
Further details — not scored
Size205 MB2 MB
Age rating17+9+
DeveloperFunction HealthCasey Lester

Customer experience

Function Health

All ratings25,084 ratings
Positive99.0%
Neutral0.4%
Negative0.6%
Written reviews351 reviews
Positive61.5%
Neutral5.7%
Negative32.8%

Dreamside

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

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

Dreamside

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Function Health

No in-app purchases

2 purchases

Dreamside

Subscriptions2
  • Dreamer$4.991 Month
  • Lucid Dreamer$9.991 Month

Questions

Is Function Health free?
Function Health is free to download, with no in-app purchases.
Is Dreamside free?
Dreamside is free to download, with in-app purchases available.
Which has better reviews, Function Health or Dreamside?
Dreamside is rated higher. Function Health averages 4.9 out of 5 from 25K ratings, while Dreamside averages 5.0 from 1 ratings.
Do Function Health or Dreamside have ads?
Neither Function Health nor Dreamside shows ads.

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