Borrowed from the Higher Ed Learning Collective FB group:

iOS (Apple):

https://apps.apple.com/us/app/scan-it-all/id647239869

https://apps.apple.com/us/app/scanner-for-me-scan-documents/id1017261655

Android:

https://play.google.com/store/apps/details?id=com.thegrizzlylabs.geniusscan.free&hl=en

https://play.google.com/store/apps/details?id=com.appxy.tinyscanner&hl=en

https://play.google.com/store/apps/details?id=com.mobitech3000.jotnotlite.android&hl=en_US

https://play.google.com/store/apps/details?id=com.intsig.camscanner&hl=en_US

https://play.google.com/store/apps/details?id=com.hp.printercontrol&hl=en_US