I'm curious why people trust apps published by banks/credit unions instead of using the substantially similar web pages with a trusted browser and password manager. I've seen a mix of anything from awful to OK from mobile banking apps.

My only use case for apps is mobile check deposits, presumably because asking for camera control on mobile devices was beyond the ability of their web developers.

iPhone:

  BoA - 457MB
  AMEX - 130MB
  USAA - 109 MB

I only have BoA because I haven't canceled my CC with them yet (kept because AMEX is not accepted everywhere). It seems I deleted my other bank apps (after I'd closed the accounts, makes sense, right?) but IIRC they were somewhere in the 150MB-200MB range. Some people just really like bloat I guess.

The app my credit union uses for online banking and card control functions is only 81MB.

My CU's is only 16mb.

USAA offers a CC.

They do, and I signed up for it. I literally just haven't bothered canceling the BoA CC yet. It's not been used since I got the USAA card (which is only used when the AMEX isn't accepted).