Because all of Eight’s data is cloud-based, using the same account across devices is a breeze.
You just need to make sure you’ve set up your login information on your original device.
N.B. If you’re changing your phone, you must setup your login information first, otherwise you won’t be able to log in on your new phone.
If you’ve got your login information set up, setting up your account on a new device is as simple as adding Eight and logging in!