Bad night? It's noted.
Log sleep and illness before each session. Your trend knows the difference between tired and different.
4 minutes a day. One long-term signal.
Your brain changes slowly.
Now you'll notice.
Five tests. Four minutes. One personal baseline that builds over weeks and months, so the question stops being "am I imagining this?" and starts being something you can see.
Free to start. No account required. Not a diagnostic tool.
Short enough to stick
Done before your coffee cools. That brevity is the point: consistency matters more than any single score.
Weeks, not moments
One session means nothing. Thirty start to mean something. Keel Pro keeps the full record.
~4 min
per session
5
cognitive tests
30 days
free history