Everything here is under Account.
Where you are signed in
Signed in lists the places your account is open, and lets you end any of them.
Worth a look if you signed in on a friend's phone, or on a machine at a study centre. Ending a session there signs that device out; it does not touch yours.
Notifications
Notifications is what we send you, and where. Turn push notifications on or off from there.
Push is per device — turning it on for your phone does not turn it on for your laptop, and a browser that does not support it says Not supported.
Your downloads
Downloads shows the books saved on the device you are using and how much room they take. If you see Storage is nearly full, that is where to clear some.
The list is per device. See Read with no data.
Cards and address
Cards and address holds the cards on file and your billing address.
Add card puts another one on. Billing address is needed before your first payment.
You can remove a card you no longer use. If you remove the one your plan renews on and put nothing in its place, the next renewal will not go through — see Pay for a plan.
Changing your email
Tap Chat with Idara on your home page and tell us the address you want. Your sign-in link goes to your email, so this is one we do with you.