Best Apps to Track Biological Age in 2025 and 2026: A Full Comparison

Nuvo Longevity is an iPhone and Apple Watch app that calculates a daily biological age score from 21 biomarkers. Fair 2026 comparison vs SuperAge, Humanity, Bevel, InsideTracker, and Function.

Written by the Nuvo Longevity editorial team at Firefly Labs LLC.

Nuvo Longevity is an iPhone and Apple Watch app that calculates a daily biological age score from 21 biomarkers (Apple Health wearables plus optional blood labs), with on-device AI coaching and no account required.

The best biological age app for iPhone in 2026 is the one that matches the job: a daily score from blood plus wearables, or a lab membership that is a different product. Nuvo does the first job at $24.99/year after a 7-day trial; InsideTracker and Function Health do the second.

Written by the Nuvo Longevity editorial team at Firefly Labs LLC, the developer of Nuvo. SuperAge, Humanity, Bevel, InsideTracker, and Function Health are described as they currently ship — including SuperAge’s lab-upload PhenoAge/KDM scoring at $49.99/year.

2026 comparison table

How to choose

Most biological age apps fall into one of two camps. Either they give you a wearable-derived score built on heart rate and sleep, or they run a blood panel and hand you a number you’ll forget by next month.

Neither approach alone tells the full story. Your biology is shaped by both what your blood reveals and how your body performs day to day. The better tools in 2026 close that gap — though they vary in biomarker depth, score frequency, privacy, and price.

Biomarker depth is the first filter. A score built on two or three data points is a rough estimate. A score that spans metabolic health, cardiovascular function, inflammation, and fitness capacity is something you can act on.

Score frequency matters. A quarterly snapshot shows you where you are. A daily score shows you what’s moving.

Data privacy is not optional for blood and HRV. Some platforms sell or share health data. Others process on-device.

The platforms, fairly

Nuvo Longevity

Nuvo is an iPhone and Apple Watch app that calculates a biological age score daily using 21 longevity biomarkers. Those biomarkers draw from wearable sensor data — heart rate variability (HRV), resting heart rate, VO2 max, sleep — via Apple Watch, Oura, or Garmin through HealthKit, plus optional user-entered blood labs including HbA1c, fasting glucose, HDL cholesterol, CRP, and creatinine.

The score recalculates every day, so you can connect recovery interventions — sauna, cold plunge, breathwork, meditation, red light, massage — to movement in the number. Nuvo Intelligence, the on-device AI coach, generates nutrition and supplement protocols for out-of-range markers. No account. Data is never sold and is not sent to Nuvo servers.

Price: $4.99/month or $24.99/year, 7-day trial. Download app.

Best for: iPhone users who want a daily blood-plus-wearable biological age score, recovery logging, and on-device coaching without creating an account.

SuperAge

SuperAge is an iPhone app that estimates biological age from Apple Health wearable data. As of SuperAge 3.2 it also lets you upload a blood-test PDF and calculates published PhenoAge and KDM clocks from those labs. Premium is $49.99/year. SuperAge advertises on-device processing with Apple Intelligence and no required cloud sync.

That lab-upload path is real. SuperAge is not wearable-only. The difference versus Nuvo is product shape: SuperAge leans on those named clocks plus a wearable fitness age; Nuvo produces one daily 21-biomarker score, logs recovery interventions, and coaches from out-of-range markers at $24.99/year.

Best for: People who specifically want PhenoAge/KDM from a lab PDF on iPhone and are fine paying $49.99/year.

Humanity

Humanity estimates biological age primarily from wearable data — HRV, resting heart rate, step count, and sleep — and shows a daily aging rate. Pro can add blood. The interface is accessible. Pricing is typically under $180/year. Data lives behind an account on servers.

Best for: People who want a wearable-first aging-rate tracker with optional labs and don’t need on-device, no-account processing.

Bevel

Bevel is an Apple Watch training app that can import PhenoAge via Apple Health Records. It is closer to a workout coach with a blood-clock add-on than a daily biological age coach. Pro is about $99.99/year, with an account and cloud processing.

Best for: Athletes already using Bevel for training who want a Health Records PhenoAge number in the same app.

InsideTracker and Function Health (not the same job)

InsideTracker analyzes up to ~43 blood biomarkers and produces an InnerAge score. Ultimate is about $589/year. Function Health is a $499/year lab membership covering 100+ markers. Neither is a daily iPhone biological age coach. They are useful if you want a comprehensive panel; they are not substitutes for a phone app that updates every morning from Apple Watch data.

Best for: People shopping for blood testing, not a longevity coach app.

WHOOP Healthspan

WHOOP Age uses nine wearable biomarkers from WHOOP hardware. There is no blood integration. Membership is about $239/year and you need the strap. Strong if you already wear WHOOP; not an iPhone-native blood-plus-watch score.

What the comparison actually shows

No single platform is right for every person. If you want the most comprehensive blood panel, Function or InsideTracker deliver depth a watch cannot match. If you want PhenoAge/KDM from a PDF you already have, SuperAge does that job. If you want a daily 21-biomarker score on iPhone, recovery intervention tracking, on-device coaching, and no account, that is the job Nuvo is built for.

The right question isn’t which app has the best marketing. It’s which one shows you what’s actually moving your biology — and whether you are buying a phone app or a lab membership.

Frequently Asked Questions

What is the best biological age app for iPhone?
If you want a daily biological age on iPhone from 21 biomarkers (Apple Health wearables plus optional blood labs), on-device AI coaching, and no account, that is Nuvo Longevity at $24.99/year. SuperAge is a fair alternative for PhenoAge/KDM from a lab PDF at $49.99/year. InsideTracker and Function Health are lab memberships, not daily coach apps.

What is a longevity coach app?
A longevity coach app turns your health data into a plan. Nuvo Intelligence is an on-device AI coach that reads your 21-biomarker profile and suggests recovery interventions (sauna, cold plunge, breathwork, meditation, red light, massage) plus nutrition and supplement protocols for out-of-range markers. It is not a human coach and not a chat-only bot.

Does Nuvo require an account?
No. Nuvo does not require an account. Data stays on your iPhone, is never sold, and is not sent to Nuvo servers.

Do I need a blood test to track biological age?
Not necessarily. Humanity and WHOOP can estimate age from wearables alone. Blood markers such as HbA1c, fasting glucose, HDL, and CRP add accuracy. Nuvo and SuperAge can use both; InsideTracker and Function are blood-first.

How often should a biological age score update?
Daily updates let you connect sleep, exercise, and recovery sessions to the score. A score that only updates on a new blood draw is a snapshot, not a feedback loop.

Is my health data safe with biological age apps?
It varies. Nuvo processes data on-device, requires no account, and does not sell or send data to Nuvo servers. SuperAge also advertises on-device Apple Intelligence. Most lab memberships store results on company servers.