What makes a widget worth building
Apple frames good widgets around three qualities, and they're worth keeping in your head as design constraints, not just slogans:
Glanceable — someone should understand it in a fraction of a second. Think Weather showing you just enough of today's forecast.
Relevant — content should match the moment, the place, and the person's patterns. Calendar surfacing your next event is the canonical example.
Personalizable — it should be configurable with the content that matters to that specific user.
