If you're looking to Download QR Code on your Chromebook laptop Then read the following guideline.
QR code: Reader App is widely used to scan documents and QR codes. - Scan documents with your camera or export directly from your phone. - Edit scanned documents right within the app. You can easily crop, rotate, adjust brightness and contrast. - Share your scanned documents vial email, messaging apps. - Send faxes directly from your phone. Simply scan your document, add the recipient's fax number, and send. - Scan QR Codes instantly - Store and organize your scanned documents in the app. With premium version you get 1 GB of storage space to store your documents. Term of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/