It doesn't seem like this is the direction you are going, but this feels like what Siri could become (though I have little faith given the history).

With your sunscreen example, I should be able to just ask Siri to do exactly this, and it could tap me in my pocket, show me a custom UI to log periodically and then disappear.

Not sure on limitations of APIs on iOS but definitely feels like there is space for a better voice assistant, just like how Raycast have created a better Spotlight on Mac.

Looks very cool so far!