Comparison

NAP26 vs Function Health

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

Head to head
About

NAP26

Experience the restorative benefits of a 3-hour nap in just 26 minutes. This program uses soothing sounds to guide you into a regenerative sleep state, leaving you alert and refreshed without grogginess. Ideal for frequent travelers and those with demanding schedules.

Highlights
  • 26-minute power nap
  • Restorative sleep
  • Rejuvenation
  • Blocks out distractions
  • Gentle wake-up cue
  • Increased alertness
Features
Read full description

NAP26 is the amazing power nap program that gives you the rest and rejuvenation of a 3-hour nap in just 26 minutes-without feeling groggy! With NAP26 you can grab a power-nap and feel the benefits of 3 hours of sleep in just 26 minutes. The soothing, pulsating sounds help you block out the world and enter a relaxed, regenerative state. Just before you enter the deep sleep cycle, a gentle voice tells me my nap is over. You wake up charged, alert, and completely refreshed. **NASA research on test pilots revealed 26-minutes as the optimum nap time, improving performance by 34% and alertness by 54%.** I am a big fan of the NAP26 power nap system. As a frequent traveler, my position takes me to different time zones and naturally I end feeling tired due to the time changes. I use NAP26 either on the plane or in my hotel room prior to meetings. It never seems to fail me! I am constantly recommending this product to my friends and associates. - Paul Brown - Airport Retail Consultant “As a firefighter, I work long hours for an extended period of time. NAP26 gives me an opportunity to catch up on lost sleep after my shift. The 26 minutes I get from NAP26 helps me fall asleep into a state of relaxation, and then I wake up to get things done before my next shift. I have recommended it to all of my buddies!” -Daren Drown, Firefighter “The NAP26 app is exactly what I needed. I sing up to 4 times on a weekend and Sunday’s I am up from 5:00am and don’t stop until 10:00pm. The 26-minute power nap keeps me going. I’ll take one around noon during my break and then I’m ready to go. I would recommend the NAP26 app to anyone and everyone!” -Jacki Taylor, Lead Singer-Sweet Chariot

About

Function Health

Gain deep insights into your health with over 160 lab tests annually, personalized protocols, and AI-powered chat. Understand your body's evolution, track progress, and make informed changes with advanced science and your data.

Highlights
  • 160+ annual lab tests
  • Personalized health protocols
  • AI-powered private chat
  • Home or office blood draws
  • Advanced MRI & CT scans
  • 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.

Screenshots

NAP264 screens
Function Health4 screens

Verdict

The call

The clearest difference is price: Function Health at Free against NAP26's $9.99. Function Health also leads on rating (4.9 vs 3.2) and update cadence (weekly vs every 3 months). NAP26's advantage is iOS requirement (14.0 vs 16.4). On ads, in-app purchases, monetization model 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

Function Health is free to download; NAP26 costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Function Health holds the better App Store score, 4.9 against 3.2. That said, the two scores are not equally well evidenced: Function Health has 25K ratings behind it against 24, so its average is the more settled of the two. Written reviews point the same way: 36% of NAP26's written reviews are positive against 62% of Function Health's.

UpkeepUpdate frequency

NAP26 ships an update every 3 months, Function Health weekly. The most recent releases landed on November 1, 2026 and November 7, 2026 respectively.

Scorecard6 real differences · 4 level
NAP26 versus Function Health: the parameters behind the verdict, then further details
ParameterNAP26Function Health
Price$9.99Free — better
Rating3.2 (24 ratings)4.9 (25K ratings) — better
Positive reviews36.2% of reviews61.5% of reviews — better
Number of ratings2425K — better
Update frequencyEvery 3 monthsWeekly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPod — betteriPhone
Requires iOS14.0 — better16.4
Further details — not scored
Size52 MB206 MB
Age rating4+17+
DeveloperPOWRNAPS Retail Concepts, Inc.Function Health

Customer experience

NAP26

All ratings24 ratings
Positive54.2%
Neutral0.0%
Negative45.8%
Written reviews47 reviews
Positive36.2%
Neutral2.1%
Negative61.7%

Function Health

All ratings25,127 ratings
Positive99.0%
Neutral0.4%
Negative0.6%
Written reviews351 reviews
Positive61.5%
Neutral5.7%
Negative32.8%

User reviews

NAP26

From 24 App Store ratings

What we love

  • 👍 Effective for power naps
  • 👍 Helps with jet lag
  • 👍 Soothing sounds (rain)
  • 👍 Induces sleep quickly
  • 👍 Refreshing after naps

Room to improve

  • 😞 Unremovable voiceover
  • 😞 Paid features removed
  • 😞 Sound is static/annoying
  • 😞 Doesn't work for everyone
  • 😞 Wakes up too early

Function Health

From 25K App Store ratings

What 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

Bugs and requests

NAP26

Reported bugs

6 issues
  • Unremovable voiceover
  • Nighttime version removed after purchase
  • App stops working (iOS 8)
  • Sound stops playing
  • Doesn't notify when nap time is over
Show 1 more
  • Sound too loud/painful

Requested features

6 requests
  • Option for full sleep (turn off before wake up)
  • Selection for power nap or full sleep
  • Modify rain sound (intensity, type)
  • Return removed nighttime version/Easy2Sleep
  • Fix app for iOS 8 compatibility
Show 1 more
  • Add refund option

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

In-app purchases

None

NAP26

No in-app purchases

None

Function Health

No in-app purchases

Questions

Is NAP26 free?
NAP26 costs $9.99, with no in-app purchases.
Is Function Health free?
Function Health is free to download, with no in-app purchases.
Which has better reviews, NAP26 or Function Health?
Function Health is rated higher. NAP26 averages 3.2 out of 5 from 24 ratings, while Function Health averages 4.9 from 25K ratings.
Do NAP26 or Function Health have ads?
Neither NAP26 nor Function Health shows ads.
Which is updated more often, NAP26 or Function Health?
NAP26 ships an update every 3 months, and Function Health weekly. Most recently, NAP26 was updated on November 1, 2026 and Function Health on November 7, 2026.

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