For example, the Breville Joule Turbo sous vide cooker, which doesn't have on-device controls, and has to be used via the associated app; if Anova gets away with requiring a subscription to use their app, then a similar move by Breville would convert a product you own into a product controlled by Breville. Now, I can see (barely) Anova making the extended features (guides, notifications, recipes, etc.) that are accessed through the app a subscription-only feature, particularly if the content is being hosted on Anova's servers, but the basic functionality of controlling the linked device should remain free.