From what I see, you want a cure all dumb and easy method to stop you from using your phone. Forget it, it's not gonna happen, there is no easy way anymore with the behaviour you are showing: reseting your girlfriend's password on your phone without feeling guilt is just beyond healthy right now.
Even if you somehow switch to another bank with a Web app, you'll probably switch from scrolling tweeter on your phone to scrolling on your laptop.
From what I see, you want a cure all dumb and easy method to stop you from using your phone. Forget it, it's not gonna happen, there is no easy way anymore with the behaviour you are showing: reseting your girlfriend's password on your phone without feeling guilt is just beyond healthy right now.
Even if you somehow switch to another bank with a Web app, you'll probably switch from scrolling tweeter on your phone to scrolling on your laptop.
Get a therapist and talk it out.