When the poster says “I often just use Photoscan on my phone” what they mean is “instead of dealing with the physical scanner at all I often use an app on my phone that takes a picture of a document with the phone’s camera, flattens out the image in software, and leaves me with a pdf the same as if the scanner were doing its job”.
That is, the scanner doesn’t “work on the phone”, but these days phone cameras and automatic image processing programs are so good actual scanners can often be bypassed.
When the poster says “I often just use Photoscan on my phone” what they mean is “instead of dealing with the physical scanner at all I often use an app on my phone that takes a picture of a document with the phone’s camera, flattens out the image in software, and leaves me with a pdf the same as if the scanner were doing its job”.
That is, the scanner doesn’t “work on the phone”, but these days phone cameras and automatic image processing programs are so good actual scanners can often be bypassed.