The number one reason to use a banking app on your phone is to deposit a paper check by taking a photo of it. I am not aware of a bank that lets you do that from a webpage.
Vanguard works on my completely google-free phone, although I had to change the OS language to English because w/ Android set to French their app would force the use of commas as the cents separator, then complain that commas are not a valid character. Another fun thing was it uses its own internal camera app, which would focus the preview, then completely ignore the focus setting and take a blurry photo of the check. Eventually I figured out the camera's default focus length and take the photo from that distance.
Vanguard works on my completely google-free phone, although I had to change the OS language to English because w/ Android set to French their app would force the use of commas as the cents separator, then complain that commas are not a valid character. Another fun thing was it uses its own internal camera app, which would focus the preview, then completely ignore the focus setting and take a blurry photo of the check. Eventually I figured out the camera's default focus length and take the photo from that distance.