Physical display specs
Resolution, diagonal size, and PPI are treated as hardware reference fields. They should be reviewed against manufacturer-style specification sources before publishing high-priority indexed pages.
Source methodology
Device data methodology
ScreenMetricLab separates physical display specifications from browser viewport references. This matters because browser zoom, OS display scaling, device pixel ratio, mobile address bars, and browser UI can change the values reported by JavaScript.
CSS viewport values
Viewport width and height are practical browser references. They can vary by browser, orientation, zoom, split-screen mode, operating system scaling, and browser chrome.
Confidence labels
Records can be marked as high confidence or review-needed. Review-needed records should be verified with real browser testing or updated source checks before large programmatic expansion.
Update cycle
Device records should be reviewed quarterly, especially after new hardware launches, major browser changes, or operating-system display scaling updates.
Before using data in production
- Verify target devices with the live viewport checker.
- Record viewport, resolution, DPR, browser, OS, and orientation together.
- Check both portrait and landscape where layout bugs matter.
- Use source notes and confidence labels before citing a record externally.