I dunno. But it was much faster to open, acquire, scan and upload to my Evernote account than it was to use the Evernote app to do the same.
That's a good reason to use the widget feature. You can just pick the camera option right from your lock screen.
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How do you do that? Is is a premium feature?
No. Either use the attachment command (the paperclip) and select camera, or tap the icon that looks like a camera. Pretty good option though there are fewer features (filter, cropping etc) than a dedicated scanning app offers.