What is the difference between QR and UPI?

UPI (Unified Payments Interface) is an instant, real-time payment system allowing transfers between bank accounts using a mobile number or UPI ID. It is versatile, supporting both person-to-person (P2P) and person-to-business (P2B) transactions. A QR code (Quick Response) is a two-dimensional code that contains payment information; when scanned, it facilitates the payment process for both UPI and other systems like Bharat QR. Bharat QR, a specific QR implementation, is primarily used for merchant transactions and accepts credit/debit cards in addition to UPI.