Pay by Bank app is a new online checkout option, powered by Mastercard. It's safe, simple, speedy, and uses bank security technology, to make payments directly from mobile bank apps. Security is taken care of by the bank. Consumers click the Pay by Bank app button at checkout to pay with the security of their trusted bank.Pay by Bank app is being introduced to banks and retailers for it to become a universal system. With digital tokenisation and banking security at the heart, Pay by Bank app takes payment systems to the next level of simplicity, security and speed.Pay by Bank app: Your bank. Your choice. Your control.