CogTracker

Brain Fog Test

Run short cognitive tasks for reaction speed, working memory, and attention, then compare your own trend across repeated sessions.

Reaction speed
Measures response latency across repeated rounds.
Working memory
Digit span checks short-term recall capacity.
Trend tracking
Lifestyle logs help separate one bad day from a pattern.
Methodology

CogTracker uses short repeatable tasks: reaction speed, digit span, Stroop attention, and pattern matching. A single session is noisy; trend lines across repeated sessions are more useful.

For cleaner comparisons, test at the same time of day and log sleep, caffeine, stress, screen time, exercise, and hydration.

Medical safety

This is not a diagnostic tool and does not screen for dementia, ADHD, Long COVID, depression, or any neurological condition.

Seek medical care if symptoms are sudden, worsening, associated with weakness, confusion, speech changes, severe headache, fainting, or daily-life impairment.