What to Get Right Before You Let an AI Assistant Touch Real Data
A chat UI and a model API key are the easy 10% of adding AI to a product. The part that actually takes design work is what happens once that assistant can read and change a user's real data — reusing the business logic you already trust instead of a second copy of it, deciding which actions need a human to confirm them first, and being honest about how far a system prompt can actually be trusted to keep things on the rails.
How Do Screen-Time App Blockers Actually Work? iOS and Android Have Completely Different Answers
Blocking an app for yourself sounds like it should be one universal feature: pick some apps, set a limit, done. It isn't. Here's exactly how Health Partner's walk-to-unlock Screen Guard works on iPhone (a real OS-level shield) and Android (three borrowed permissions plus a hand-built block screen), including the undocumented platform quirks that shaped both.
Is Your Journal Really Private? What Real End-to-End Encryption Actually Looks Like
"Your data is encrypted" is a sentence almost any app can write, regardless of what its database actually looks like. Here's how to tell the difference between that and real end-to-end encryption, where the provider can't read your data even if it wanted to, using Health Partner's own journal encryption as a fully worked example, down to the algorithm.