Ring, the Amazon-owned company known for its doorbell cameras, just launched Pet Tag to help owners find their lost pets. The tag attaches to a pet's collar and has a custom QR code printed on it ...

This unadorned code can be visually modified to a certain extent. For example, a number of agencies are providing custom QR codes for businesses that incorporate their logo or an image.

The Camera app has supported simple QR code detection since iOS 11, and it wouldn’t be too much of a stretch for them to extend that experience with augmented reality elements.