Can I use my Cook-key® or TM6® with the purchase of the in-App IOS subscription? Yes. As the One Year App IOS store Membership works for the Cookidoo® App, as well as the TM6®/Cook-key® devices. Related articles Do I need to be registered with Cookidoo® in order to use the TM6? How do I find recipes in different languages? How do I filter different types of recipes?