You are welcome to download the Bluejacketeer free companion app or use the website on as many devices as you please. There is no limit to the number of devices you can use; however, you can only be logged into one device at a time. If you are logged into two devices at once, you will receive a multi-session message. This may occur if you are switching between devices while studying. The last device logged into will have priority.
Please make sure you are syncing your free companion app often so all your devices will be on track with your studies. 

The Bluejacketeer Team