pistachio: test your senses
reflex, color & memory tests
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
a new test every day, the same one for everybody — with a mark to clear and a
row of squares to send when you've cleared it.
how good are your senses, really?
short tests for your reflexes, your eye for color, your ear for pitch, 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.
WHAT IT MEASURES
speed — how fast you answer the world. tap the moment it lights, or pick the
right one of four.
sight — hold a color in your head, then mix it back. count what flashed.
sound — find the pitch, hear the odd note out, catch a gap in the noise.
space — judge a vertical with the room lying to you, pace out a distance,
unfold a shape in your head.
time — hold a length of time without counting, keep a beat once it stops.
mind — repeat a sequence that grows every go.
balance — stand on one leg while it reads the sway you can't feel. hold a
phone out and let it measure the tremor everybody has.
body — a heartbeat, through the camera.
ONE A DAY, THE SAME ONE FOR EVERYBODY
the calendar picks it, not us. there's a mark to clear rather than a queue to
stand in — clearing it is worth saying out loud, and falling short isn't worth
saying at all. when you're done you can send a row of squares: the grid carries
the shape of the run, the raw number carries the fact.
BETTER WITH SOMEONE ELSE
hand the phone across the table and play the same test one after the other. the
second score stays hidden until you've both finished, so nobody is aiming at a
number. or send a link — they can open it with nothing installed, play in a
browser, and send one back.
there's a board for the last seven days, one entry per person per test, which
you can decline or leave whenever you like.
BUILT TO BE HONEST
every test traces to a real published paradigm — the psychomotor vigilance task
(Dinges & Powell), Corsi block-tapping, the rod-and-frame test (Witkin & Asch),
Vierordt's law — and where a phone can't honor the paradigm, it says so instead
of quietly fudging it.
scores are pistachio's own scale, not a mark out of a hundred. there are no
percentiles, because a second yardstick turns the first one into decoration.
the raw measurement is always there underneath: milliseconds, cents, a match
out of ten.
where the comparisons are thin, they're labeled provisional, because they are.
free, no account needed, no ads.
pistachio is not a medical device. nothing it measures diagnoses anything, and
a low score is not a symptom. if something here worries you, talk to a doctor
rather than to a phone.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
the tuning fork knows when you've nailed it — spot on is now spot on. hard edges on the fair share, a longer mode on the inner clock, and everyone gets a place on the leaderboard.
The developer, weird little ideas, LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Location
- Contact Info
- Identifiers
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- weird little ideas, LLC
- Size
- 23.7 MB
- Category
- Education
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.0 or later.
- iPhone
- Languages
- English
- Age Rating
9+
- 9+
- Contains
User-Generated Content
Health or Wellness Topics
- Copyright
- © 2026 Charlie Kubal