Itsy Scan - Barcode/QR scanner app for iPhone and iPad

Itsy Scan reads and copies barcodes and and other types of machine readable codes from
+ Physical objects using your camera.
+ Images copied onto your pasteboard (e.g. screenshots).
+ Photos from your camera roll.

Itsy Scan is better than the default QR code reader (from Control center) because it
+ Scans barcodes and all machine readable codes (not just QR codes).
+ Reads barcodes from previously copied images on pasteboard or existing pictures in your photo library.
+ Keeps a history of scanned information (which is synchronized using iCloud to your other iOS devices).

All image processing is done on your iPhone using VisionKit and no data ever leaves your phone.

Usually Itsy Scan - Barcode/QR scanner iOS app used & searched for