I.

Pupil

Your eyesight, checked at home in three minutes a week.

In development
A brown iris on a dark screen, over the words That’s the ideaHome after a check: the Iris, Done this week, and estimates for each eyeYour trends: each eye’s focus and letters, compared with its own usual range

Pupil is an iPhone app for teens and young adults. A short weekly check follows how each eye focuses and reads, compares it only with your own usual, and tells you when it’s worth seeing an eye doctor. It’s a wellness tracker, not an eye exam.

This is your Iris: a brown iris with eight colors to choose from

Meet your Iris

Setup takes a few minutes. You turn a focus ring, a living iris opens, and it’s made just for you. Then you pick a check day.

The left-eye step: glasses off, cover your right eye, and bring the phone closer

Do the weekly check

You bring the phone closer until the letters turn sharp, then swipe the way each letter points. The front camera measures distance, and nothing leaves the phone.

In your usual range: both eyes read the way they usually do

Get a plain answer

Each eye is compared only with its own usual. Most weeks it’s “In your usual range”.

Worth getting checked: your right eye’s distance vision has changed for a few weeks in a row, with a button to find an eye doctor

Worth getting checked

If something changes for a few weeks in a row, Pupil says it’s worth getting checked and helps you find care.

A one-page summary for your doctor, with each eye’s trend and how Pupil measured it

Doctor summary

One page to share at the appointment.

42 minutes outside this week, with buttons to add 15 minutes, 30 minutes or an hour

Daylight

Time outside as a gentle weekly habit.

Safety and privacy

Never a diagnosis

No prescriptions and no red, amber or green zones. Readings show as estimates with a likely range.

Stays on the phone

Camera, distance and light data never leave the device. There are no analytics, ad or third-party SDKs.

Reviewed every time

Every change to copy, results, alerts or urgent help goes through a safety review before it ships.

Tested measurement

Letter sizing, distance, focus math, scoring and trend detection are plain Swift with unit tests. Thresholds don’t change without a test and a written decision.