Office Lens
Office lens (For assignment submission)
Useful and powerful tool to scan hardcopy assignment to pdf format
Good scanning quality
App store link (for iPad, iPhone):
https://apps.apple.com/hk/app/microsoft-office-lens-pdf-scan/id975925059?l=en
Play store link (for Android):
https://play.google.com/store/apps/details?id=com.microsoft.office.officelens&hl=en