A companion for your cognitive life.
Evidence-based interactive tools for understanding and optimizing brain health — built on the 2024 Lancet Commission on Dementia Prevention, the UK Biobank (n = 38,967), and peer-reviewed neuroscience. Every tool runs in your browser. Nothing is stored.
Measure what matters — then change it.
Each tool is a standalone research-grade instrument. Inputs stay local. Results travel only as far as you choose to share them.
How old is your brain?
The Brain Age Index estimates your brain's biological age from 17 evidence-based factors — built on the 2024 Lancet Commission on Dementia Prevention and MRI Brain Age Gap research from the UK Biobank.
Sleep-Cognition Optimizer
Your personalized sleep schedule, computed from chronotype science, 90-minute sleep cycles, and cognitive performance research. Based on UK Biobank data from 224,714 adults.
Cognitive Load Calculator
Measure your current mental bandwidth and identify the biggest drains — based on Sweller's Cognitive Load Theory and working memory research.
ADHD Screener (Adult)
Evidence-based self-screening using the validated ASRS-v1.1 (World Health Organization Adult ADHD Self-Report Scale). Clinical-grade instrument, research-backed.
How Brain Lab tools are built.
Three commitments shape every instrument in this laboratory. Without them, none of this matters.
Peer-reviewed sources only
Every factor, every weight, every recommendation traces back to published research in journals like The Lancet, Alzheimer's & Dementia, Nature, or Sleep Medicine Reviews. We cite explicitly — no vague "studies show" language.
Named methodology
Each tool publishes its full methodology under a unique identifier (LBL-BAI, LBL-SCO). If you want to challenge our weights, cite our method, or reproduce our calculations — every step is documented in plain language.
Zero data retention
Every calculation runs locally in your browser. Nothing you enter is sent to our servers, stored, or tracked. You can verify this by opening your browser's developer network tab while using any tool.
Other laboratories in the publication.
LifeByLogic is organized into four labs, each focused on a different dimension of the examined life.
Crossroads Lab
Monte Carlo simulators and multi-variable calculators for life's biggest forks — career, education, relocation.
Behavior Lab
Behavioral economics and cognitive psychology tools to detect biases, build better habits, and resist manipulation.
Life Dashboard
Your personal analytics engine. Track sleep, mood, spending, and productivity — and surface the patterns hiding in plain sight.