You can easily scan QR codes that are already on your phone
SMRTR summary
Both Android and iOS have built-in tools that let you scan QR codes already saved on your phone, so you don't need to print or display them on another screen. This makes it much easier to use QR codes stored in screenshots or photos.
SMRTR provides this summary for quick context. The original article belongs to Engadget.
Read the original article