You can just disable any network connections and see, if the service still works. Text recognition in images (Live text/Vision framework) does. Now you could ob

You can just disable any network connections and see, if the service still works. Text recognition in images (Live text/Vision framework) does. Now you could obviously say, "Who knows about any logs, and whether they are secretly transferring them as soon as there is any network connection or not?" Well, this is another topic, namely this of basic trust, and applies to any application and any vendor. (And, if your business is operating systems, living up to this trust may be a vital business decision. In contrast to some vendor of a random app, there's a strong incentive to do so.)