Tap the big checkmark when you think the photo is good enough, and the app will correct some distortion and import the document in black and white (by default) to a PDF file.You can also tap the photograph/gallery icon to get to a file picker if you need to manually navigate to images outside the camera roll. Above the shutter is your camera roll, offering easy access to images you've already captured with your camera app - just tap the images you'd like to add to a document and then tap the orange arrow that appears to the right of the shutter button (above right). You'll probably just use the default 'document' mode, but you can quickly switch to scanning business cards, photos, and whiteboards as well, each of which triggers its own preset modes. Along the bottom of the viewfinder, below the shutter, are different modes you can switch between based on what you're scanning. The viewfinder has all the tools you need immediately accessible with just a few taps. Apart from an interstitial screen that you'll see the very first time you launch it (above left), you'll always be dumped straight to the viewfinder (above center), as with Adobe's app. Just download the app, fire it up, grant it the required permissions, and you're off. Right: Selecting images from the camera roll.

Left: Firing up the app for the first time.

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