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Pro Keeps history of scanned codes
You can keep a history of every code scanned, or just the ones that you've scanned more than once.
Pro Open source
Barcode Scanner is an open source project and the Github repository can be seen here.
Pro Can generate QR codes for apps, bookmarks, contacts, and clipboard data
Pro Auto-use Flash
Can turn on from settings to turn on the Flash light automatically.
Pro Supports Wi-Fi QR codes
Can be generated on https://zxing.appspot.com/generator/