Customers of Royal Bank of Scotland and Natwest will now be able to access their online accounts with a touch of their fingertip.
From today, customers using an iPhones 5S, iPhone 6 and iPhone 6 plus will be able to open their banking app with just their finger - a first for British bank customers - thanks to Apple's fingerprint recognition technology, Touch ID.
The bank said the technology would make it easier and more convenient for customers to access their accounts as they will no longer have to remember tricky passwords.
Touch ID, used on the latest iPhone models, allows users to open their phone as well as access other services, such as making purchases from the iTunes store.
Online and mobile banking has grown enormously in recent years as people use technology to keep an eye on their finances. The bank said that some 50% of its 15 million customers use online banking, while more than three million use its mobile banking app every week.
More than 167,000 customers check their account on the way to work between 7am and 8am every morning – making it the bank's busiest "branch" - while it estimates to have around 1.8 million active iPhone users, of which 880,000 have the correct model to use the fingerprint technology.
Revolution in banking
Stuart Haire, managing director at RBS and Natwest Direct Bank said: "There has been a revolution in banking, as more and more of our customers are using digital technology to bank with us.
"Adding Touch ID to our mobile banking app makes it even easier and more convenient for customers to manage their finances on the move and directly responds to their requests."