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Lab-style brain check-ins

Know how your brain is doing today

Classic cognitive tests you can run in five minutes — Stroop, 2-back, Flanker, Corsi, and more. Not vague “brain age” games: the same task families used in attention and memory research, playable in your browser.

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No account needed to play · Subscribe to save results, streaks, and experiments.

What you get

Real tasks, not hype

Stroop, Flanker, Go/No-Go, Digit Span, Trail Making, PVT — quick probes of attention, inhibition, memory, and speed.

Trends beat one-off scores

A single number on a good or bad day is noise. Save results and watch how sleep, stress, and caffeine show up in your line over weeks.

Test what you’re changing

Trying a new supplement, sleep stack, or focus routine? Run experiments and compare cognitive scores across the protocol.

Built for curious adults — students and knowledge workers who want a quick focus check, biohackers tracking nootropics or sleep, or anyone who wants an honest mirror on attention and reaction time. Not a clinic; not a diagnosis. Just show up, play fair, and learn something useful.

How it works

  1. Pick a test or run the Daily Challenge — four random tasks in about five minutes.
  2. Play in your browser — no app install. Most tests take two to five minutes.
  3. Optionally save scores to build a private history, streaks, and charts on your dashboard.

Try a test — free, no signup

📋

Daily Challenge

Run four random tests in sequence. Takes about 3–5 minutes.

Start daily challenge
🎯

Stroop Test

Identify the font color of each word — not the word itself. Test your inhibitory control.

Play now — no account needed
↔

Flanker Task

Identify the center arrow while ignoring flanking arrows. Tests selective attention and interference.

Play now — no account needed
⏸

Go/No-Go Task

Press on Green Circle, withhold on Red Triangle. Tests response inhibition and impulsivity.

Play now — no account needed
🔁

2-Back Task

Press when the current letter matches the one from 2 steps ago. Tests continuous working memory.

Play now — no account needed
#

Symbol-Digit Substitution

Match symbols to numbers using the key. 90 seconds to complete as many as you can. Tests processing speed.

Play now — no account needed
🔢

Digit Span Task

Recall sequences of numbers forward or backward. Tests verbal working memory.

Play now — no account needed
⬛

Corsi Block-Tapping

Watch blocks light up, then tap them in the same order. Tests visuospatial memory.

Play now — no account needed
🔗

Trail Making Test

Connect circles in order as fast as you can. Tests processing speed and task switching.

Play now — no account needed
🃏

Wisconsin Card Sorting Test

Sort cards by a hidden rule that changes after 10 correct — tests cognitive flexibility and perseveration.

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⏱

Psychomotor Vigilance Task

Stop a millisecond counter as fast as you can after random delays — measures sustained attention, lapses, and false starts.

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🎰

Iowa Gambling Task

Draw 100 cards from four decks — learn which choices pay off over time. Tests risky decision-making.

Play now — no account needed
🏛

Tower of London

Rearrange colored balls on three pegs to match the goal — tests planning and following rules.

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🧠

What is this?

Scientifically-backed cognitive tests to assess attention span, inhibitory control, and reaction speed.

📝

Articles & brain-testing guides

Why take tests for your brain, what games like the Stroop measure, and how to get more from short sessions.

Read

Save your scores. Watch the trend.

Every test is free to play. Subscribe when you want a private dashboard — saved history, rolling analytics, daily streaks, and experiment tracking. $7.99/month, cancel anytime via Stripe.

Full dashboard

$7.99 / month

  • Unlimited saved results and progress history
  • Analytics charts, streaks, and community percentiles
  • Experiments — track scores across a supplement or protocol
  • All tests stay free; cancel anytime

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