These are the banks with the best apps, according to consumers

J.D. Power and Associates released its 2017 mobile banking apps scorecard on Monday.

The consumer insights firm asked 5,564 retail bank customers to rate their bank's mobile app across five categories, in weighted order: ease of navigation; appearance; clarity of information; range of services; and availability of key information.

Surprisingly, just 31% of retail bank customers use mobile apps, J.D. Power found. Less than half of respondents said they felt their information was secure when banking on the go.

"Even with the mobile channel having the highest satisfaction and consistency of all channels, adoption is stubbornly low-particularly when compared with overall smartphone penetration," writes Bob Neuhaus, director of financial services at J.D. Power. "The challenge for both retail banks and credit card companies is to establish accessible entry points that ease resistant customers onto the mobile channel where they will, in all likelihood, quickly find that they are very satisfied with the experience."

Some people may have qualms about mobile finances, but millennials are hooked; 76% of 13 to 35-year-olds say they've used payments apps like Venmo or Square Cash in the last 30 days.

Here's the full ranking: