To me, as long as it's available, export to an open standard is all I need; but I agree that, if it's revocable, then it's hardly unfettered. How would an app

To me, as long as it's available, export to an open standard is all I need; but I agree that, if it's revocable, then it's hardly unfettered. How would an app allow unfettered access in an irrevocable way? That is, if I were an app developer (I'm not), and wanted to provide this service to my users in a way that wouldn't require them to trust my good intentions, then how would I do it?