Picture Scanner App. The app also boasts good quality for things. If that doesn't work, here's a way to do it manually.
Download the free adobe scan mobile app to scan anything into a pdf using your mobile device. Plug the usb cable from your scanner into an available usb port on your device, and turn the scanner on. Photos from the past, meet scanner from the future.
If that doesn't work, here's a way to do it manually.
Open the printers & scanners settings. Unfade was created by the developers of scanbot, the leading document scanner app in the app store. The app detects, crops and saves different photos individually. Open the printers & scanners settings.