Privacy policy
Updated November 13, 2026
The short version
The test runs entirely in your browser. The squares you mark and your past results are never sent to us. We do not ask for your name or email, and there are no accounts. The site does not use your camera.
What stays on your device
- Test results. Each finished test is saved with its date so that you can compare. Up to 120 results are kept. You can delete them with the “Delete past results” button.
- Grid options. The colors and line thickness you chose.
- Screen size setting. If you match a bank card to set the grid size, your browser stores one number, the scale of your screen. No card details are read or stored. The card is only held against the screen.
- Theme choice. If you switch between light and dark, your browser remembers it.
- Offline copy. Your browser keeps a copy of the pages you visit so the site works without a connection.
- Dismissed notices. If you close a notice, your browser remembers that for a week.
You can clear all of these by clearing this site's data in your browser settings.
Downloads and reminders
The result image and the calendar reminder are made on your device and saved to it. They are not uploaded. What you do with them is up to you.
Analytics
We use Google Analytics to count visits and see which pages are useful. It collects information such as pages viewed, approximate region, device type and referring site, using cookies. It does not receive your test results. See how Google uses information from sites that use its services.
Advertising
This site shows ads from Google AdSense. Google and its partners use cookies to serve ads based on your visits to this and other websites. You can turn off personalized advertising in Google Ads Settings, or opt out of many vendors at aboutads.info.
Hosting
The site is hosted on Cloudflare, which processes technical data such as IP addresses to deliver pages and protect against abuse.
Children
This site is for adults and does not knowingly collect personal information from children.
Changes and contact
We will post any changes on this page with a new date. Questions go to hello@amslergridtest.com.