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[PUZZLE]
iOS · Android
Cognitive Challenge
Attention training, one round at a time.
About
Cognitive Challenge is a Stroop-style attention test. The word names one colour while the ink shows another, and your job is to answer the ink — not the word. It sounds trivial until the clock starts.
It is built as a repeatable drill rather than a course: one daily challenge to keep the habit honest, plus practice modes when you want to work on a specific skill. Your results stay on your device.
What's in it
- — Daily challenge with a single shared test
- — Practice modes for focused sessions
- — Session stats and streaks
- — No sign-up, no account
Privacy
No account is required to use Cognitive Challenge. What the app does and does not collect is written out in full in the privacy policy.

Actual app screen