Focani

Focani is a browser-based focus training app built on attention paradigms taken from published cognitive-science research — among them the Stroop task, Trail Making, the Flanker task, Go/No-Go and multiple object tracking.

Rather than reducing attention to a single "brain age" number, it scores several separate dimensions — interference control, sustained attention, response inhibition, visual search and others — and tracks each of them over time. A free account saves your session history, charts progress per dimension, and shows where your attention drifts rather than only how you did today.

Sessions run in the browser and take about two minutes. Difficulty is adaptive on several tasks: a staircase adjusts the response deadline to your own threshold instead of stepping through fixed levels. There is a daily challenge — the same task and difficulty for everyone, so times are comparable — and a global leaderboard.

Everything is free, with no session limits and no paid tier. An account is optional and only adds saved scores, history and the leaderboard.

For each task the site publishes the source paper, how this implementation differs from the published procedure, and what it cannot tell you. The exercises are for practice and self-tracking; they are not validated instruments and cannot screen for any condition.