Australian bank Westpac has extended biometric access to its banking app to iPads, while revealing good growth in terms of usage of its fingerprint-enabled app on the iPhone.From this week, fingerprint sign in for the bank's Westpac live app has been made available on iPad Air 2 and iPad mini 3 with iOS 8.Using biometric security, customers can check account balances and transactions, and make transfers and payments.Staff this week told ZDNEt that take-up of the biometric app was strong, with 165,000 customers signing up in the six weeks since its launch.Gai McGrath, Westpac retail banking general manager, told the magazine that the introduction to iPads adds further security and convenience for Westpac customers who choose to bank on their mobile devices.”This pace of change has accelerated with banking on smartphones, which we have also helped lead. This is something that will not slow down, and we're excited to be at the forefront of yet another innovation, this time providing instant access to banking for customers via fingerprint sign in,” she said.”This is the next step in for our successful digital banking service Westpac Live, which has been used by over 2.9 million personal customers to manage their accounts on the move, and which we are now swiftly introducing to our 800,000-plus business customers.”In December, Westpac says about half of its “digitally active” users are now banking on their mobiles and generating about $50 billion worth of transactions each year. The bank's head of digital, Harry Wendt, told The Age that the fingerprint sensor app added an extra level of security and was “probably safer than a PIN”. “Someone could put a gun to your head and use the (PIN) codes on any device,” but fingerprint access required customers to use the specific device on which their fingerprint was encrypted in order to access the service.