Contact lens tracker · iPhone
How old is
this pair?
LensLog keeps the count you can’t — days on the pair you’re wearing, lenses left in the box, prescriptions, exams. It can nudge you when a pair is due, so two weeks doesn’t quietly become six.
FREE BETA · TESTFLIGHT · NO LENSLOG ACCOUNT
Everything on the prescription card. And the stuff that isn’t.
Four counts every lens wearer keeps in their head. LensLog keeps them for you.
A countdown for every pair
Day 1 is the day you open them. The countdown runs on the calendar — the way replacement actually works — and can remind you before a pair is due.
Boxes that count themselves
Logging a change draws a lens from stock, per eye. “How many are left?” is a glance, with a heads-up before you run low and before a box expires.
Your prescriptions, in one place
Contacts and glasses Rx side by side, with exams and your eye doctor attached — and a countdown to each expiry, so renewal never sneaks up on you.
Your whole lens life
A timeline of changes, incidents, and notes. Import years of old logs; export everything as JSON whenever you want. It’s your data.
New to prescriptions?
The Understand screen walks you through every value on your card — sphere, cylinder, base curve — in plain language, with interactive explorers you can poke at. No prescription required: explore a sample card first, and see your own numbers explained once you add them.
OD −2.50 · BC 8.6 · DIA 14.2 — tap any value to learn what it means.
Make it yours
The eye on your Today screen is drawn, not stock — so it can look like your eye. Pick any iris, eyelid, and glasses color from the built-in presets or a full color picker.
Blue
No account. No analytics.No server.
LensLog can’t see your data. It lives on your iPhone and — if you turn on sync — in your own private iCloud, where we can’t see it. The app collects nothing about you, and there’s nothing to sign up for.
ON-DEVICE DATABASE · PRIVATE ICLOUD SYNC · ZERO THIRD-PARTY SDKS
Read the full privacy policy →