Photo classification takes place on device as well. The models are generated on Apple's side, but the photos on your device are classified by your device while

Photo classification takes place on device as well. The models are generated on Apple's side, but the photos on your device are classified by your device while it sleeps and charges. Check the last line on this page: https://support.apple.com/en-us/HT207368 https://support.apple.com/en-us/HT207368