Best Longevity Tracking Apps for Apple Watch
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.
Written by the Nuvo Longevity editorial team at Firefly Labs LLC, the developer of Nuvo.
2026 comparison
| App | Biomarkers | Blood + wearable | Apple Watch | Score | Privacy | Price |
|---|---|---|---|---|---|---|
| Nuvo Longevity | 21 biomarkers (Apple Watch, Oura, or Garmin via HealthKit + optional blood labs: HbA1c, fasting glucose, HDL, CRP, creatinine) | Yes | Apple Watch-native | Daily biological age | No account · on-device | $24.99/yr |
| SuperAge | Apple Health wearables plus lab PDF upload for PhenoAge and KDM blood clocks | Yes | Apple Watch | Wearable age + PhenoAge/KDM when labs are uploaded | On-device Apple Intelligence | $49.99/yr |
| Humanity | Rate of aging from wearables; blood optional on Pro | Yes | Apple Watch / Oura / Mi Band | Rate of aging | Account required · cloud | Up to $180/yr |
| Bevel | PhenoAge via Apple Health Records import | Yes | Apple Watch-native | Periodic | Account required · cloud | $99.99/yr (Pro) |
| WHOOP | Hardware-based recovery + strain (WHOOP Age on Peak) | No | Proprietary strap only | WHOOP Age (Peak tier) | Account required | $239/yr (Peak) |
| InsideTracker / Function | Lab memberships (blood panels), not a daily iPhone score | Yes | No Apple Watch longevity coach | Per blood draw | Account required | InsideTracker ~$589/yr · Function $499/yr |
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 wearable and optional lab 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.
What is a biological age score?
A biological age score estimates how old your body is functioning compared with your chronological age. It is calculated from biomarkers like VO₂ max, heart rate variability, resting heart rate, and blood values such as HbA1c and CRP.
Do longevity apps need blood test data to be accurate?
Wearable-only apps can estimate a fitness age, but they cannot see metabolic and inflammatory markers like HbA1c, fasting glucose, HDL, and CRP. Apps that combine Apple Watch data with blood biomarkers produce a more complete picture. Nuvo blends both in one daily score. SuperAge can compute PhenoAge/KDM when you upload a lab PDF. InsideTracker and Function are blood-first lab memberships.
Is my health data private in these apps?
Privacy varies. Most apps upload health data to servers behind an account. Nuvo processes data on-device with no account — biomarkers are not sent to Nuvo servers and are never sold. SuperAge also advertises on-device Apple Intelligence processing.
Which Apple Watch longevity app tracks recovery interventions like sauna and cold plunge?
Nuvo tracks interventions such as sauna, cold plunge, breathwork, meditation, red light, and massage and shows how they relate to your daily biological age score. Most other apps report aggregate scores without linking those specific recovery sessions.