LifeReckoner™
by CZ Optimization — the instrument for the path
You can't see your healthspan destination — it's decades over the horizon, too far to fly by feel. LifeReckoner is the instrument you navigate by: take a fix from your labs and biomarkers, hold a heading on the moves that matter most, and see how each shifts your modeled trajectory — healthspan, a lifespan range, and cause-specific risk. Evidence-graded, and honest about uncertainty.
Given your age, labs, risk markers, and the interventions you're weighing — which moves the needle most, and by how much does each shift your modeled trajectory: healthspan, a lifespan range, and cause-specific risk?
It never claims to know your date of death, and never treats a biomarker score as destiny.
It does not diagnose or prescribe. It informs the conversation you have with your doctor, it does not replace it.
Its value is letting you weigh scenarios under explicit, evidence-graded assumptions and see which levers matter most.
Tune your inputs. Watch the model recompute.
Nine domains of inputs (labs, fitness, nutrition, sleep, substances, meds, conditions and more), each one feeding a population-grounded estimate that updates live.
Inputs in. Modeled scenarios out.
Set your baseline
Import it in one step, your AI builds it from an instruction sheet, or enter it directly across nine domains of demographics, labs, fitness, and behavior.
Choose your levers
Toggle the interventions and conditions you’re weighing, from proven basics to experimental compounds. Gated levers unlock only with their indication.
Set your course
Commit to a heading: options ranked by possible magnitude of benefit — about so many months of impact each, shown with its range. Decide the heading with your coach and physician. Re-run it as things change and watch the ranking update.
A number you can actually trust.
You never get a lone exciting figure. Every modeled result shows its work.
Baseline & deltas
A grounded starting point, then the modeled change each lever produces.
Uncertainty range
Every estimate ships with a plausible range, never a false-precision single number.
Evidence class
An A–E evidence grade on every lever, so you know proven from promising from provisional.
Cause-specific risk
Endpoints are labeled, all-cause vs. cardiovascular, metabolic, and more.
Provenance & safety
Coefficient provenance and safety/monitoring context behind each result.
Healthspan, not just lifespan
Models years of healthy function, not only total years.
Questions, answered.
What does the application tell me?
It surfaces your options, ranked. From your inputs on demographics, health, labs, activity, and other measures proven to impact longevity, it prioritizes the interventions you can weigh, ranked by possible impact — a decision to make with your coach and physician. The ranking rests on a science-backed, standards-based population median lifespan / healthspan estimate shown with its range, and it is worth re-running as your labs and habits change.
What do I get as a Member vs a Biohacker?
Member ($19.95/mo) unlocks everything on the site to read — all member writing and casts — plus the LifeReckoner demo. Biohacker ($39.95/mo) adds the full LifeReckoner app (model your own labs and scenarios), exclusive Biohacker writing and casts, import/export and scenario comparison, and the coach / prescriber report.
Is this medical advice?
No. The LifeReckoner is not a medical tool and does not predict individual results. It uses recognized scientific sources (NHANES, WONDER, and published research studies) along with other population health data to produce scenarios, similar to how insurance companies model risk using the same tools.
How does billing work?
A free account lets you browse all free content with no card. Member and Biohacker are billed monthly; once paid a month is non-refundable, but you can turn off renewals at any time.
LifeReckoner™ models scenarios under explicit assumptions. It does not predict your date of death, does not treat a biomarker as destiny, and does not replace a clinician, a diagnostic workup, or shared decisions about medication. It's a thinking tool I hold to an evidence standard.