Probes this browser's actual capabilities so we know what's safe to build against. Every check is wrapped so one unsupported API can't break the page. Scroll to the bottom to generate a copyable report.
update and monochrome are the ones that actually tell us
whether this is being detected as an e-ink display.
Click "Write test value", then fully close this browser (or restart the device) and reopen this page. If the value below still shows a timestamp, storage survives across sessions.
Draw or tap in the box below with your finger, then with the Stylus 2, and watch
what pointerType is reported for each.
If you have a Bluetooth/USB keyboard, try typing here too: