In the same way no one owns a printer anymore, a scanner is usually right out of the question -- which is where this scanning app comes in. The Scanner Pro 6 from Readdle makes use of your smartphone's (or iPad's) built-in camera, turning the device into a portable scanner. Whether you need a copy of your passport, receipts to invoice or even a way to remember what was on the whiteboard during a recent brainstorming session, this app will come in extremely handy.
After you scan, you can save images to your phone or to cloud-based services such as Evernote or Google Drive. The $3 scanning app also has image optimization features including edge detection, perspective correction and shadow removal to ensure thee photo is readable.