CogTracker

Know your brain. Track the changes that matter.

A single score tells you nothing.
Change over time tells you everything.

Research shows that increased variability in reaction time predicts cognitive decline years before symptoms appear. Yet most brain tests only give you a snapshot.

CogTracker is different. We help you build a personal baseline and detect meaningful changes—the kind that actually matter for your brain health.

Based on peer-reviewed research • 3 minutes, 2 tests • Free

How it works

1

Take the test

Two quick assessments: reaction time and Stroop test. Takes about 3 minutes.

2

Build your baseline

We remind you every 3 months. Your pattern emerges after 3-4 tests.

3

Spot changes early

See your trends over time. Unusual variability shows up before you'd notice it.

Built on research, not marketing

"Increased variability in cognitive performance predicts cognitive decline in older adults, particularly on speeded or selective attention tasks." — Nature, Translational Psychiatry (2022)

Unlike brain training apps that focus on improving scores, CogTracker focuses on detecting change—the approach supported by longitudinal cognitive research.

The tests

Simple Reaction Time

Press a key when you see a signal. Measures processing speed—one of the earliest indicators of cognitive change in research studies.

Stroop Test

Name the ink color of words that spell different colors. A gold-standard measure of executive function and cognitive interference used since 1935.

Why CogTracker?

Longitudinal focus

We track change over time, not just single scores. That's what the research actually supports.

Privacy-first

Optional encrypted storage with a password only you know. We can't see your data even if we wanted to.

No account needed

Just your email. No passwords to remember, no profiles to create, no apps to download.

Free forever

No premium tier, no subscriptions, no upsells. Brain health monitoring shouldn't cost money.