Your device inspection lab
Build a baseline. Change one condition. Compare what the browser actually observed. Your saved reports stay on this browser and origin.
Four devices. Your own evidence.
The progress counts categories with saved observations, not devices that passed a test. Skip any device you do not have.
Saved snapshots
JSON import reads a local file; it does not upload it. Maximum 1 MB, 20 reports.
Your lab starts empty. Open a test, make an observation and choose Save snapshot.
Baseline A → repeat B
Choose two saved reports from the same test. Differences will appear here.
Counts depend on what you did. Different durations, devices, mappings or thresholds are confounders. A smaller number does not automatically mean a healthier device.
Label the conditions
Record the device, connection and action. Screen assessments are entered by you.
Change one variable
Keep duration and pace consistent. A second device or application makes a useful control.
Export before leaving
Storage may be blocked or cleared. Localhost and a future public domain do not share saved data. Export JSON to transfer it.