@bberenberg - you may be interested in https://sahha.ai/ They're building a developer API to measure wellness and mood without user input. I'm considering maybe trying it in an app we're developing, but I have no affiliation with them (aside from being in the same part of the world Aus/Nz). - Source: Hacker News / 10 months ago

A modern smartphone, no, not currently. Feature phones maybe, if made specifically with low-power parts. Personally I'm interested in putting this in a watchy [0], that can get around on tens of microwatts average consumption because of deep sleep states and an e-paper screen. [0] https://watchy.sqfmi.com. - Source: Hacker News / 5 months ago

I just learned about the Watchy e-paper watches and feel like they scratch much the same itch. https://watchy.sqfmi.com/. - Source: Hacker News / 10 months ago

Found it! Watchy is the name, have you heard of it? https://watchy.sqfmi.com/. - Source: Hacker News / 10 months ago

I don't care for watches but someone mentioned Watchy [0] on Lemmy yesterday and I'm thinking about getting one just for fun. [0] https://watchy.sqfmi.com/. - Source: Hacker News / 11 months ago

Watchy is a open source e-paper watch. https://watchy.sqfmi.com/. Source: about 1 year ago