One month into open alpha, Circadia has moved from a tool I built for my own impossible sleep into an app with enough real N24 data to make the research side feel less theoretical. The Community tab is live, Jon replaced the particle filter forecast with a tag-aware Kalman-IMM model, and the app now has enough users to expose the administrative layer under health software: platform rules, security audits, server costs, and the boring financial reality of keeping something useful alive.
Your Sleep Forecast Shouldn't Panic After One Weird Night
Circadia's new adaptive forecast is better at handling skipped nights, naps, crashes, recovery sleep, and sudden changes in your sleep pattern. It learns only from sleep data people choose to share — and the more of your own history you share, the better chance Circadia has of understanding your pattern.
None of the apps I tried even let me manually enter my sleep data, let alone predict my next bedtime or track my drift. So I built one. Two days into open alpha, here's what's been built, what's coming, and a real ask.