The story
If you are looking for the angle, it is one of these four.
Why ITMO exists
"Is The Mountain out?" is a real question people here ask each other every single day, and it has never had a good answer. Weather forecasts describe clouds, not sightlines. The Mountain can be completely socked in downtown and blazing from a hill ten miles away. The only reliable source is somebody who is looking at it, so ITMO is built entirely on that: a hyperlocal, crowdsourced answer, updated the moment Tahoma breaks through.
The community angle
The watchers are the product. Their reports build the live map, public webcams cover what nobody is watching, and the app gives the habit a shape: the First Out of the day, reporting streaks, Tahoma Tokens for showing up, and the Super Watchers Club for the people who show up most. It behaves less like a utility and more like a neighbourhood keeping an eye on something it loves.
The solo developer
ITMO is built and run by one person, David Lindahl, as a side quest from Rainier Watch, the apparel company he started after years of tweeting Mountain sightings on his commute. There is no venture funding and no growth team. Memberships pay the hosting bill, and the app ships when it is ready.
Why it is not a weather app
A weather app models the sky. ITMO reports what people can actually see, which is a different question with a different answer surprisingly often. Nothing here is predicted or inferred: every point on the map is a person who looked up, and the whole thing falls apart the moment the community stops watching. That dependency is the feature.