Sean Gilchrist, digital banking director at the bank, suggested it can be easier for individuals to keep track of what is happening to their finances by being able to access the information on the move.
He accepted that mobile banking is a "relatively new" process, but claimed its popularity is growing at a "phenomenal" rate.
"Being in control of your money starts with knowing how much you've got and where it is being spent," said Mr Gilchrist.
His comments followed the publication of research by Barclays, which showed that nearly three-quarters of adults overestimate their bank balance, with Londoners believing they have an extra £91.62 on average.
This month, the same firm claimed many small enterprises in the UK are using smartphones to carry out a variety of business procedures, such as creating invoices and dealing with correspondence.