You can use the membership on up to two devices at the same time. You can do this by logging in within the Adobe Creative Cloud app with the Adobe ID to which the membership is linked.
Creative Cloud can be used on two devices at the same time. A maximum of two Adobe Creative Cloud sessions may be open at any one time. If you want to switch between more than two devices, you can always free up a session by logging out of the Creative Cloud App with your Adobe account on one of the two devices with an open session. The second session will then be freed up, and you can then start a second session on another device.