Public longevity projects

Turn one of your health actions into a public project.

Start with a concrete lever, follow a short 7-day progress path, and publish what you tried, noticed, or learned. Your small attempt is not banal. It gives the community something more useful than advice: a realistic reference.

Create your project Public username, private email. Live after submission. Browse examples
Portrait of Andreas Holzhäuser, founder of LifeTrajectory Built by Andreas Holzhäuser Meet the founder and see the scientific foundation Founder, self-taught product builder and father of four Rule-based educational model · method and limits published

A personal reason

Why I built LifeTrajectory

I’m Andreas Holzhäuser, founder of LifeTrajectory, a self-taught product builder and father of four. One question is deeply personal to me: What can I do today to remain physically capable, mentally alert, and present for my family for as long as possible?

I hope to live long enough to see my great-grandchildren grow up. That ambition led me to build LifeTrajectory: not as a medical promise, but as a transparent educational tool that turns longevity research into understandable next steps.

Andreas Holzhäuser Founder and developer of LifeTrajectory

Andreas Holzhäuser · verified LinkedIn profile Watch the 46-question video series on YouTube

Transparent foundations

How the calculation is grounded

Living to 100 Life Expectancy Calculator

LifeTrajectory adapts parts of its questionnaire structure and category-based rule framework. This reference is not an independent validation of LifeTrajectory.

View the original calculator
Li, K., Liu, C., Liao, L. et al.

Lifestyle risk factors and residual life expectancy at age 40, BMC Medicine (2014). It supports selected lifestyle-risk context, not every model coefficient.

Read the full study

LifeTrajectory adapts these foundations into an educational estimate and personalized feedback. It is not a clinically validated prediction, diagnosis, or substitute for medical care.

See the method, factors, version and sources
Smiling person returning from an evening walk

Example project

10-minute walk after dinner helped my sleep

I tried a 10-minute walk after dinner for seven days. On work nights, falling asleep felt less scattered and my sleep felt steadier. Next, I would keep the walk short and start right after cleaning the kitchen.

Action10-minute walk after dinner ObservationSleep felt steadier on work nights NextKeep it short and attach it to kitchen clean-up

This is not a grand transformation. It is useful because it is real, specific, and easy for someone else to compare with their own evening.

Create yours like this
Action first

Each project works best when it names one behavior, one context, and one honest observation.

Useful even when small

A short experiment can still be valuable when it tells people what was realistic in daily life.

Connected to the app

Questionnaire tags connect public projects back to the levers people see in their own results.

Have a 7-day test, AI Action Plan, or personal health experiment?

Publish the concrete part: what you tried, what changed, and what someone else should know before trying it. Your lived example can help someone else begin.

Create your project
1 public project Topic: Beginner Fitness