Comparison

Function Health vs Dad Unit

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

Head to head
About

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.

Highlights
  • 160+ lab tests annually
  • Personalized health protocols
  • Private AI Chat for results
  • Connect health wearables
  • Advanced MRI & CT scans
  • 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—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.

About

Dad Unit

This app is a gamified fitness community designed for fathers, offering functional strength training and personalized nutrition. It fosters accountability through team-based challenges and leaderboards, with an AI coach to guide progress.

Highlights
  • Gamified fitness tracking
  • Functional strength training
  • Personalized nutrition plans
  • AI coaching (Sergeant Gains)
  • Team-based challenges (Fire Teams)
  • Daily habit tracking
  • Progressive leaderboards
Features
Read full description

THE DAD UNIT A fitness community built for dads, by dads. Not another workout tracker. A proven system that's transformed thousands of fathers, backed by a brotherhood that holds the line and pushes through competition. We focus on functional strength training that makes you look good and perform even better. Sure, you'll get a six-pack. You'll also be able to run a mile with your six-year-old on your back. Look great. Be useful. Don't settle for one. PICK YOUR TRACK Three tracks built around your goals, your equipment, and your real-world time. Jacked Dad, Hybrid Dad or Foundation. You can cut, bulk or recomp with goal-aware macros tuned to your TDEE, not some generic calculator your wife's coworker swears by. PICK YOUR FIRE TEAM This is a social app at its core. Although you can take the lone wolf route and just grind on your own but life’s better when you do it with friends. Fire Teams are small squads of dads who push each other, compete weekly, and call out the silence when one of you ghosts. Start your own team with your real-life crew or jump into an open team and make new friends. Either way, you've got dads in your corner and dads breathing down your neck. That's the whole point. THE OPERATING SYSTEM The Dad Unit isn't a workout tracker glued to a food log. It's one system where everything talks to everything. Your training, your nutrition, your sleep, your steps, your weight, your HRV, your VO2 max — all flowing into one place. Metrics, graphs, data - it’s all the stuff dads need and love. And then there's Sergeant Gains, your AI coach. He pulls all your data and tells you the truth. You skipped two workouts and your protein is garbage? He notices. No sugar coating. No participation ribbons. TICK THE BOXES TTFB. Five daily habits that accrue points and make you look better. Train, Eat, Sleep, hydrate, and move. The whole program runs on it. Miss them and the leaderboard knows. Hit them and you start watching the rank tick up. RANK UP Dad Bod. Weekend Warrior. Suburban Spartan. All the way to Alpha Dad. You don't buy rank. You earn it. And Alpha Dad requires passing the PT test, so don't get cute. COMPETE OR COAST WED WODs. FYFridays. Weekly Challenges. Fire Teams Ranks. 41+ leaderboards. Daily, weekly, monthly, yearly, all-time. Global and team. You can hide from a lot of things in life. You can't hide from the board. BUILT BY A GREEN BERET AND CELEBRITY TRAINER TURNED DAD BOD DESTROYER A former Special Forces medic and celebrity trainer got tired of watching dads dissolve into recliners. So he built this. Used every day by actual fathers. NO BS. JUST SHOW UP. Download. Pick your track. Find your fire team. Stay accountable. The Dad Unit is free to download. Pro subscription required for full access — workouts, leaderboards, nutrition tracking, Fire Teams, and Sergeant Gains. TTFB. Privacy policy: thedadunit.com/privacy-policy Terms of service: thedadunit.com/terms-of-service

Screenshots

Function Health4 screens
Dad Unit4 screens

Verdict

The call

Function Health and Dad Unit both sit at 4.9 stars, but that hides the real split: 100% of Dad Unit's written reviews are positive against 62% of Function Health's. Dad Unit also leads on device support (3 vs 1). Function Health's advantage is in-app purchases (none vs 2) and ads (none vs shown). On price, rating, update cadence and iOS requirement 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. Dad Unit sells 2 in-app purchases, starting at $24.99 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 Dad Unit. That said, the two scores are not equally well evidenced: Function Health has 25K ratings behind it against 29, so its average is the more settled of the two. Written reviews are what separate them: 62% of Function Health's written reviews are positive against 100% of Dad Unit's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on October 16, 2026 and October 14, 2026 respectively.

Scorecard7 real differences · 4 level
Function Health versus Dad Unit: the parameters behind the verdict, then further details
ParameterFunction HealthDad Unit
PriceFreeFree
Rating4.9 (25K ratings)5.0 (29 ratings) — better
Positive reviews62.0% of reviews100.0% of reviews — better
Number of ratings25K — better29
Update frequencyWeeklyWeekly
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationSubscriptionFree with in-app purchases — better
Best chart rank#205 — better—
DevicesiPhoneiPhone, iPod, Apple Watch — better
Requires iOS16.415.1 — better
Further details — not scored
Size202 MB106 MB
Age rating17+12+
DeveloperFunction HealthMICAH ALLEN MEHAN

Customer experience

Function Health

All ratings24,885 ratings
Positive99.0%
Neutral0.4%
Negative0.6%
Written reviews347 reviews
Positive62.0%
Neutral5.5%
Negative32.6%

Dad Unit

All ratings29 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews19 reviews
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

Dad Unit

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Function Health

No in-app purchases

2 purchases

Dad Unit

Subscriptions2
  • Dad Unit Pro$24.991 Month
  • Yearly Pro$249.991 Year

Questions

Is Function Health free?
Function Health is free to download, with no in-app purchases.
Is Dad Unit free?
Dad Unit is free to download, with in-app purchases available.
Which has better reviews, Function Health or Dad Unit?
Dad Unit is rated higher. Function Health averages 4.9 out of 5 from 25K ratings, while Dad Unit averages 5.0 from 29 ratings.
Do Function Health or Dad Unit have ads?
Dad Unit shows ads; Function Health does not.
Which is updated more often, Function Health or Dad Unit?
Function Health ships an update weekly, and Dad Unit weekly. Most recently, Function Health was updated on October 16, 2026 and Dad Unit on October 14, 2026.

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