Michael Horvath, co‑founder of Strava, has released Foggy, a $5.99 fog‑tracking app that uses NOAA satellites and user reports—with no venture funding, no city partnership, and no integration into SF’s official climate plans.

Michael Horvath, co-founder of fitness‑tracking giant Strava, has launched a for‑profit fog‑tracking app called Foggy that charges users a one‑time $5.99 fee—with no venture backing, no municipal partnership, and no apparent integration into San Francisco’s climate‑resilience plans.

The app, built by Horvath and his wife MacBeth Horvath under their software company Nyfik, pulls NOAA satellite data and crowdsources real‑time observations to map Bay Area microclimates down to neighborhood blocks. It updates every five minutes and offers 2‑ and 24‑hour playback loops. Unlike the flood of climate‑tech startups that raise venture rounds before shipping, Foggy is funded entirely by its download fee, according to its website and SFGate reporting. A search of SEC Form D filings turned up no exempt‑offering paperwork for Nyfik, and the app has drawn no visible discussion on Hacker News.

San Francisco’s Heat and Air Quality Resilience (HAQR) Plan, published last year, makes no mention of Foggy or any similar third‑party data source, and city Chief Resilience Officer Brian Strong’s office has not announced any collaboration with the app. The Horvaths have not reported any campaign contributions or lobbying activity tied to the project.

“The way people talk about fog is so lyrical, if you will,” Michael Horvath told SFGate. “Bringing that out in the experience not only helps us to be more accurate, but it also makes it a lot more joyful for the people who are using it.”

Foggy’s privacy policy states it collects no accounts, shares no data with third parties, and anonymizes location information. The app is available on iOS and Android.

For now, the venture is a classic Bay‑Area niche utility: a hyper‑local tool built by a founder who already has exit money, monetized directly through user payments rather than venture capital or government contracts. Whether the city will ever tap its data—or whether the model can sustain a team beyond a side project—remains an open question.