Native app on phone > bookmarked site > typing site name (but only if using native browser password manager to auto-complete when the domain is correct).

Or something like that. I hate when I have to type site URLs from printed material (usually only doctor's bills, yet another reason to move to single-payer/socialized care) because I'm paranoid I'll get it wrong. Even more so with some of the janky URLs used by medical payment processors (contrived but realistic example: http://paymemoney.doctors.systemhealth.net/~drabdullahriaz/l...). Le Sigh.