Royal Bank of Scotland has launched a new service for its RBS and NatWest customers enabling them to log on to the bank’s mobile application using their fingerprints. RBS said the new ‘Touch ID’ would be available for nearly one million Apple iPhone users who have RBS or NatWest mobile banking apps. The technology recognizes customers’ fingerprints so they do not need to remember a password to log in. RBS had said earlier it would invest over 1 billion pounds ($1.5 billion) over the next three years to make it easier for customers to bank when they are on the move and offset a decline in branch usage. The move is part of the bank’s reaction to a decline in customers using its branches and growth in those banking online and via mobile phone apps. RBS said the technology would enable 880,000 RBS and NatWest customers who have particular types of iPhones to access their accounts within seconds.