Bank of Maharashtra (BoM) expects to grow its customer base by at least 10 per cent on the back of its new mobile banking app — MahaMobile. Currently, the bank has a customer base — both savings and current account — of 18 million. “We expect the latest initiative of new mobile app to get us more new customers besides providing better service to existing ones,” RK Gupta, Executive Director, BoM, told BusinessLine .