Free tools

Measure where you actually stand.

Five free interactive tools from Harland Reed. No fluff, no generic charts — each one shows your real baseline so you can act on it. Pick yours, drop your email, and it's yours.

Calculator

Biological Age & Longevity Baseline

Most longevity protocols fail because they treat a 50-year-old like a 20-year-old. This interactive diagnostic analyzes your sleep, stress, mobility and lifestyle markers to calculate your true biological age vs your chronological age.

Estimator

Metabolic Rate & Insulin Sensitivity

Standard caloric equations break down after 50. Plug in your daily metrics to discover your exact metabolic baseline, target macronutrient ratios, and optimal protein-synthesis thresholds to burn visceral fat without stripping lean muscle.

Tracker

Sarcopenia Risk & Lean Muscle Mass

After 50, muscle drops 1–2% a year. Input your strength, grip and output markers to assess your sarcopenia risk profile and locate exactly where your vulnerabilities lie.

Auditor

Sleep Quality & Cortisol Rhythm

Disrupted sleep and elevated cortisol accelerate cognitive decline. This tracking lab maps your evening stress patterns and sleep latency, and shows the behavioural tweaks that unlock deep, age-reversing recovery.

Proxy test

VO2 Max & Heart-Rate Recovery

VO2 max correlates directly with lifespan. Use non-invasive, home-based step tests and heart-rate recovery windows to estimate your cardiovascular capacity safely — benchmark it, track it, improve it.

Printable one-pagers

Three free, print-ready sheets you can pin to the fridge. No account, no fluff — just the week laid out.

Printable · Checklist

Prime Life Labs Starter Sheet

A simple 7-day movement, protein and recovery checklist for over-50s. One quiet, repeatable week — tick the box each day.

Get the Starter Sheet

Printable · Checklist

Weekly Mobility Checklist

A calm 6-move daily flow and a 7-day plan to keep joints easy and movement confident after 50. Six minutes a day.

Get the Mobility Checklist

Printable · Checklist

Sleep & Recovery Sheet

A 7-night wind-down, rhythm and recovery plan — so your body rebuilds while you rest. Same wake time, screens off, steady sleep.

Get the Sleep Sheet

Get your tool

Choose a tool above to get started.

Educational purposes only. Not medical advice. Consult a physician before starting any new programme.