Privacy policy
Applies to the EyeScore website and the EyeScore Chrome extension. Last updated November 7, 2026.
Short version: everything EyeScore measures and saves stays in your browser on your own computer. EyeScore has no server and no accounts, and it doesn't use analytics, ads or trackers. Nothing is sent to us or to anyone else.
What EyeScore stores, and where
| What | Why |
|---|---|
| Screen setup for each screen: its size in pixels, pixels per millimeter, how far you sit, and the name you gave it | To draw the tests at the right size and to pick the right settings on each screen |
| Your test results: smallest and faintest letters you could see, color-tile results, night check, no-glasses result and tired-eyes log entries | To work out your settings and show you why |
| Your settings: mode, manual adjustments, sites you turned EyeScore off on, apps you turned it on for, and how text is enlarged on sites where you chose that | To apply your choices |
The website keeps this in your browser's local storage. The extension keeps it in Chrome's extension storage on this computer. You can download a copy of the tired-eyes log as a file yourself; EyeScore never uploads it.
Test results describe how well you saw the tests on your screen, so treat them as personal. They aren't a medical record or a diagnosis.
What the extension reads on web pages
To size text, the extension looks at the pages you open: the font size and font of the main text, how much text there is, and whether the background is light or dark. It uses this right away, inside the page, to choose a zoom level and filters. It does not save, copy or send page content, and it does not keep a history of the pages you visit. It saves a site's name only when you change a setting for that site: turning EyeScore off (or on, for apps that start off), or choosing how text is enlarged there.
On sites where it has to zoom less to keep the page's layout, it remembers that zoom while Chrome is open, so the page doesn't resize again each time you open it. This is kept in memory, not saved, and Chrome clears it when it closes.
Permissions the extension asks for
- Read and change data on the websites you visit (content script on all sites): needed to measure each page's text and apply your text size, contrast, color and night settings everywhere.
- Storage: saves your results and settings on this computer.
- Active tab: lets the toolbar button and keyboard shortcut turn EyeScore off or on for the site you're on.
Sharing
EyeScore doesn't share, sell or transfer your data, because it never receives it. If you choose to copy a profile code (to move your settings to another computer), that code contains your settings and you decide where it goes.
Deleting your data
Remove the extension from Chrome to delete everything it stored. To clear the website's data, clear this site's data in your browser settings.
Children
EyeScore isn't directed at children under 13. It doesn't collect personal information from anyone: everything stays on your own computer.
Changes and contact
If this policy changes, the new version will be posted here with a new date. Questions: use the contact link on EyeScore's Chrome Web Store page.