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 How many recipes/times can I cook with my TM6 once my Cookidoo® membership expires? Do I need to be registered with Cookidoo® in order to use the TM6? Is it true that when I buy a Cook-Key® I get all the recipes as a trial for six months? What happens after that?