Cofounder at Envelope here. Yes, a well polished banking app is much easier to use for many tasks

- Push notifications within seconds of swiping your card - Frictionless to check your balance/budget/cards with bio auth - Mobile check deposit (as others here have stated) - Instantly locking/unlocking your cards - Budgeting built-in

If, to you, "doing online banking" means "sitting down at my computer and scrolling through the PDF statements on Chase's website" (I don't blame you, I've been there), then yes, doing that on a desktop is much easier. I'd encourage you to take a look at how far banking apps have come recently.