Size:

Size can be measured in pixels, centimetres, inches or visual degrees.

To transform inches or centimetres to pixels we use the ppi value from the app settings.

To transform visual degrees to pixels we use the viewingDistance value from the test properties.

Screen width units are measured in a scale -1 to 1. We use the screenResolution value from the app settings (width in landscape mode).

Screen height units are measured in a scale -1 to 1. We use the screenResolution value from the app settings (height in landscape mode).

Time:

Time can be measured in seconds or frames.

To transform frames to seconds we use the frameRate value from the test properties.

Angle:

Angles can be measured in radians or degrees.

Luminance:

Luminance is measured in a scale from 0 to 1.
Using the value of maximumLuminance of your device and the value of the luminance in your test settings, the real value in cd/m2 is also displayed informatively.