An opt-in or opt-out model won't work, because I can turn off my phone and not use it, or I can use a different phone. Why do that when there's a solution? Again, the solution is that you create a trust between end-users and government that here is a solution that you have, it's in your control and it is available. There is no digital divide in the solution that we're proposing. It's available on both Android and iOS. On the data, again, the data remains on your own device.
Let me give you a very different analogy here. Imagine that all your digital assets are kept in your home. Nobody has the right to come into your home unless it's with a warrant because you're accused of an illegal breach, right? If that's the way I think about my data, then that's the way I would try to utilize the app. I would use the application, because it benefits me as well—