The really really good news with the Jump universal login is that once an account has been set up (either through the Jump dashboard on a computer, or using the Jump App) it can be accessed using either method (without having to do a second setup). Just go to the login page and enter the common email and password and Bob’s your uncle! And better still, it doesn’t matter which process you use to first set up the account (dashboard or App).
However (and there’s always a ‘however’) if you are a Skinny phone user, you must use a different email for your Jump account. Nothing has changed here; this is the way it has always been.