Why on-device processing is the only real privacy guarantee, and what that means for mobile app architecture.
Privacy isn't a checkbox. It's not a statement in your terms of service. It's not a toggle in your settings app.
Privacy is architecture. And most apps get this backwards.
The Architecture Test
Here's a simple test for any app that claims to be "privacy-first":
If your server goes down, can anyone still access user data?
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