Recall

Watch the grid, tap it back. Every clean round adds one light — a browser cousin of the block-tapping span tasks memory labs have run since the seventies. Two wobbles and the run is over; your span decides your animal.

A game score on a phone is not a memory assessment, and this one doesn’t pretend to be — if memory is genuinely worrying you or someone you love, that conversation belongs with a GP, not a grid. For the rest of us: span loves a good night’s sleep, which is where the sleep calculator comes in. Then race Reaction or Track, or head back to the Lab.