sixteen short tests for your reflexes, your eye for colour, your sense of time, your memory and your steadiness. most take under a minute. at the end you get a shape — the things you're good at, and the things you're not.
every test is a real paradigm from the psychophysics literature, run properly: randomised intervals so you can't game the timing, frame-accurate stimulus onset, and comparisons segmented by screen refresh rate so a faster phone doesn't flatter you. where the norms are thin, it says so instead of inventing a percentile.
coming to the app storemost of it is better with someone else in the room. hand the phone over, let them play, and tell the app it wasn't you — their run goes on their own card, not yours. send it to them afterwards and it lands in their app. they don't need an account, and they don't need the app installed to open the link.