Unfortunately OCR is in my experience not as smooth as within Evernote or Google Keep. When I take a picture using the OneNote app on Android, OCR never works. You have to use the separate Office Lens App to upload an image and move it to the correct place in your note later. Also: I've got quite a few old PDF docs containing scans of contracts as images. Google or Evernote enablefull text search everywhere, OneNote cannot search for text in these PDFs files .