> How do you deny an app network access and allow it to share your data across your own devices? With your partner? commenting only the technical aspect, witho

> How do you deny an app network access and allow it to share your data across your own devices? With your partner? commenting only the technical aspect, without suggesting anything is or is not a good idea, apple's operating systems could offer a service whereby apps could hand over data to the OS which it would save to icloud on their behalf, and hand back to only that app or other instances of it (as determined by the user). that, plus normal networking denied to the app would do the job nicely.