Challenger banks have turned their attention to artificial intelligence (AI) as they seek to provide a more personalised approach to banking. German digital bank Number26 has launched Pulse26, a new app that uses AI to provide updates based on the customer's personal banking history. Number26 says the more a customer uses their account, the "more accurate" the analysis becomes. It adds that Pulse26 will also provide "periodic, fun insights". The firm says: "In the first weeks after launching this feature we will start with your favourite spot – the restaurant that you visited most and where you used your Number26 card."