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This category emphasizes staying with a bounded task or work interval: completing a sequence accurately, retaining information, keeping a steady pace, or using a timer and short preparation routine before real work.
This category places bounded task-completion pages beside aids for organizing real work, but it does not combine them into a concentration score.
Memory and pacing records belong to their specific tasks; timer and breathing pages do not measure cognitive performance.
Filter the tool set by the kind of attention demand you want.
16 tool entries in the current filter.
Select only filled-circle targets on changing symbol boards and review hits, misses, false clicks, accuracy, and timing.
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Watch an ordered sequence on a 3×3 grid, reproduce it, and review level, attempts, accuracy, and local history.
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Test visual memory by recalling highlighted grid positions, then review accuracy, level, mistakes, and browser-only session history.
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Repeat a four-pad color sequence that grows each round and review best length, mistakes, and average input delay.
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Recall digit strings from 3 to 20 digits with adjustable display time, strict matching, spacing, and local best length.
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Run a 1-, 2-, or 3-back position-and-letter task and review hits, misses, false alarms, and task accuracy.
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Switch between number, color, or shape rules and compare accuracy and median response time on repeat and switch trials.
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Complete two simple tasks separately and together, then compare accuracy, missed events, response time, and dual-task cost.
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Identify two targets in a rapid visual sequence and explore how the spacing between targets changes second-target accuracy.
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Set focus, short-break, long-break, and cycle lengths, run the timer, and keep completed focus blocks in local history.
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Follow box, 4–6, or 3–3 visual breathing cues for one, three, or five minutes with optional sound.
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Open five date-based activities, mark each item manually, and keep the current-day completion state in local browser storage.
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Choose a goal, daily time, and difficulty label to create a seven-day rotation of site tools with local completion checkmarks.
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Compare visual patterns, identify matches or differences, and review accuracy, response time, error types, and difficulty progression.
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Generate white, pink, or brown noise locally in your browser with volume, timer, gentle fade, and no audio upload.
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Review browser-only results across focus tools, compare recent sessions, export data, and clear your local history at any time.
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Memory tasks retain different information; the concentration task combines short accuracy and pace; Pomodoro and breathing support scheduling and preparation without measuring cognitive ability.
Keep sequence or grid settings fixed for memory results. Timer aids record elapsed blocks and cannot be added to accuracy or response timing.
These questions stay tied to the visible content on this page.