What is biological age?
Biological age is an estimate of your body's condition based on lifestyle habits — sleep, physical activity, recovery, and circadian regularity. Unlike chronological age which only moves forward, your biological age can decrease based on your daily choices.
How does LYF+ calculate my biological age?
LYF+ analyzes 4 health pillars via Apple HealthKit: sleep (35%), physical activity (30%), recovery via HRV and resting heart rate (25%), and bedtime regularity (10%). The app combines these scores into a daily longevity score and estimates your biological age from it.
Do I need an Apple Watch to use LYF+?
No, an Apple Watch is not required. LYF+ works with iPhone alone for sleep, steps, and circadian regularity. However, with an Apple Watch, LYF+ unlocks the Recovery pillar (heart rate variability and resting heart rate) for a more precise score.
What Apple HealthKit data does LYF+ use?
LYF+ reads your sleep hours, step count, heart rate variability (HRV), resting heart rate, VO2 Max, and bedtimes from Apple HealthKit. All data stays on your iPhone and in your secure account — LYF+ never shares your health data.
Which scientific protocols is LYF+ based on?
LYF+ draws from 3 recognized longevity protocols: Bryan Johnson's Blueprint (strict routines, supplementation), the David Sinclair Protocol (intermittent fasting, cold exposure, NAD+ activation), and the Andrew Huberman Stack (light exposure, sleep optimization, stress management). You choose the protocol that fits you during onboarding.
How much does LYF+ cost?
LYF+ offers a monthly subscription with a 7-day free trial, plus a yearly subscription. The exact price is shown in the App Store and within the app. There is no free version — the free trial lets you test all premium features before deciding.
Is LYF+ a medical device?
No. LYF+ is an information and wellness tool designed to help you understand your health habits. It is not a medical device and does not replace professional medical advice. Always consult a healthcare professional for any medical decisions.
Is my health data shared with third parties?
No. Your health data stays on your iPhone and in your secure account. LYF+ never sells or shares your personal data with third parties. See our privacy policy for full details.
Is LYF+ available on Android?
No, LYF+ is available only on iPhone (iOS 16 or later) because the app relies on Apple HealthKit to access your health data in real-time. An Android version is not planned at this time.
How can I lower my biological age with LYF+?
LYF+ identifies your weakest pillar each day (sleep, activity, recovery, or regularity) and sends you an actionable tip based on your chosen longevity protocol. Consistent improvement over 4 to 8 weeks can significantly reduce your estimated biological age.
What is the difference between LYF+ and WHOOP or Oura Ring?
WHOOP and Oura Ring require buying a separate wearable with a paid subscription. LYF+ uses only your existing iPhone and Apple Watch through Apple HealthKit, with no new hardware to buy. LYF+ also centers on 4 explicit pillars (sleep, activity, recovery, regularity), while WHOOP and Oura provide more raw metrics for you to interpret on your own.
How can I improve my HRV with LYF+?
LYF+ sends targeted notifications to improve your HRV: physiological sighing (double inhale followed by long exhale), brief cold exposure (1 to 3 minute cold shower), sauna sessions of 15 to 20 minutes, and Zone 2 cardio. These recommendations draw directly from the protocols of Andrew Huberman and David Sinclair.
Which longevity protocol should I choose in LYF+?
LYF+ automatically recommends the protocol that matches your weakest pillar and profile. Bryan Johnson Blueprint fits rigorous data-driven profiles. David Sinclair Protocol suits people attracted to intermittent fasting and cold exposure. Andrew Huberman Stack works for beginners or anyone who wants to optimize sleep and stress through morning light.
How long does it take to see results with LYF+?
Most users see their longevity score improve within the first week thanks to simple adjustments (earlier bedtime, 10 minutes of morning walking). A significant drop in estimated biological age requires 4 to 8 weeks of consistency across the 4 pillars, according to current longevity research.
Does LYF+ work offline?
Yes. Biological age calculations and tracking of the 4 pillars work entirely offline on your iPhone. An internet connection is only required for syncing with your account (backup) and to receive personalized coaching notifications based on your chosen protocol.
