NewA different way to measure your fitnessEstimate your biological age
Take the test and get a personalized biohacking program, built from a published model and a measurement you take yourself.
Discover my biological ageAbout 7 minutes. No medical data required.
Take the test
Six blocks, about seven minutes, including a pulse measurement you take yourself.
Get a personalized program
One lever at a time, over fourteen days. Never forty recommendations at once.
Stay on track with regular follow-up
A twenty-second weekly check-in, and a monthly recalculation of your fitness age.
Take control of your energy
The result is measured before and after each cycle. Even when it hasn't moved.
What our users reach with Peak
+125
Take the test for free
The quiz is free. Your detailed result opens with a free 3 days trial, cancel anytime.
4.7out of 125 reviews
Taking back control of your energy is simpler with support.
The protocol fits on one line. It's the first time I've made it through fourteen days.
I ignored other apps' reminders. Here there's only one, and it lands at the right moment.
The end-of-cycle review shows where I dropped off, without sugarcoating the result.
One lever at a time. The rest waits its turn, and that changes everything.
The recovery blocks cut my afternoon slump by fifteen hours.
I actually stick with it. Small steps, but they add up.
The number moves slowly, the energy score moves fast. It's the latter that keeps me going.
Taking my pulse made me take the test seriously.
Follow the guidance of your AI biohacking expert
The assistant knows your history: your answers, your past protocols and their results. It asks how your week went and adjusts the current protocol. It does not replace a health professional and does not claim to.
Take the test to get the programTodayDay 6 / 14
Current protocol
Circadian anchoring
10 minutes of outdoor light before 9 a.m.
Mark as done
Energy
6.1
Fitness age
33.4
−1.6 yr
What is the calculation based on?
On a published model for estimating VO2max without exercise, from the HUNT study (Nes et al., 2011). The calculation is a deterministic function: the same answers always give the same result. No language model is involved in the number.
Is this a medical test?
No. It's an informational, wellness-oriented estimate. It is neither a diagnosis nor medical advice, and no clinical data is asked of you: no blood pressure, no lab work, no document to upload.
How much does it cost?
The quiz is free. Your detailed result opens with a free 3 days trial, then the subscription is $19.99 per month (or annual), cancelable in three clicks before the trial ends and after.
How accurate is the result?
The model carries a margin of about ±5 years, shown next to the number. That's why the product emphasizes change over time rather than the absolute value of a single measurement.
What happens to what I declare?
Your answers are encrypted and hosted in the European Union. They are never stored in your browser. You can export them or delete your account at any time, which truly erases the rows.