How many devices can I add to my Cookidoo® account? You can register up to five devices with your Cookidoo® account, e.g. three Cook-Keys® and two TM6 appliances. Related articles What is the Trade-In Program? What languages are available for recipes on Cookidoo® and on my Thermomix®? How many Gigabytes is the Cook-key®? How do I connect my TM6® to Cookidoo®? What is Cookidoo®? How Much Does it Cost?