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Genuinely free, no-signup tools. Nothing you do on these pages is saved or sent anywhere.

Free Attention Span Test (Reaction-Time Check), No SignupA free, no-signup reaction-time attention check that runs entirely in your browser. Nothing you do is sent anywhere. See a real result instantly, with honest framing: this is not a diagnosis.

Train your focus, free

Dopa Break helps you rebuild your attention span with small daily reps. Dopa Break is free to use on the web, with no card required and no ads in the app.

Get started free