What is a QR scanner and how does it work?

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A QR (Quick Response) code is a two‑dimensional barcode that stores information in a square grid of black‑and‑white modules. Unlike a traditional linear barcode, a QR code can hold text, URLs, contact details, and even multimedia content.
A QR сканер is an app that uses your device’s camera to recognise and interpret these codes. Modern smartphones have built‑in scanners, but many third‑party apps offer extra features and greater flexibility.
Where are QR codes used today?
Their application range has grown enormously:

• Retail and logistics – tracking products, managing inventory
  
• Marketing and advertising – instant website access, extra product info
  
• Payments – by some estimates, QR‑based payments will hit $8 trillion by 2029
  
• Restaurants and cafés – digital menus, loyalty programmes
  
• Healthcare – sharing patient and medication data
  

According to recent studies, 41% of consumers scan QR codes several times a week or more, and 68% are more likely to choose a brand that includes a QR code on its packaging. Meanwhile, 92% of companies already use “connected packaging” with QR codes.
As experts note, QR codes are no longer a novelty – they have become a core part of business infrastructure. Dull but reliable.

What’s your take?

• Which QR scanning app do you use?
  

• Have you ever encountered suspicious QR codes or fallen victim to scams?
  
• Where have you spotted QR codes in the most unusual places?