Scanbot (ios and Android app) https://scanbot.io/en/index.html .
I like the backup to Google Drive, OCR is there and seems fine but didn't used it much.
I’ll chime in for Scanbot as well. I used to use a work multi page scanner for my documents, but unless it’s more than 10 pages I just use Scanbot now. It’s got great OCR and it automatically backs up to Google Drive or Dropbox.
I think this is the one I use as well, or a similar one that does basically the same. Much more convenient than taking a scanner everywhere..
Scanbot is fantastic, I've been using it for years now.