Your body has
a clock.
Listen to it.
Circadian maps your personal rhythm and quietly surfaces insights in your browser — so you focus when you're sharp, rest before you crash, and stop fighting your biology.
Your 24-hour energy map
Most people follow generic schedules. Circadian builds a model of your energy across the day — based on your behavior, not averages.
Install & observe
Circadian runs quietly in the background, learning your work patterns, energy peaks, and natural rest windows — without collecting personal data.
Get gentle nudges
A discreet overlay appears in your browser when your energy is shifting — alerting you to focus windows, natural breaks, and wind-down moments.
Align your day
Over time, your schedule reshapes around your biology. Less willpower. More flow. Work with your clock, not against it.
Built for how
humans actually work
Real-time rhythm indicator
A subtle clock icon in your toolbar shows your current circadian state — no interruptions, always present.
Personal energy timeline
A daily chart of your predicted energy and focus across 24 hours — built from your own behavioral patterns.
Intelligent break prompts
Suggested breaks that align with your natural ultradian rhythms — not arbitrary 25-minute timers.
Works everywhere
Integrates seamlessly with the sites you already use — no workflow changes required.
Fully private
All processing stays on your device. No data leaves your browser. No account required to get started.
Adapts over time
The more you use Circadian, the more accurate your rhythm model becomes — learning your chronotype precisely.
"Modern schedules were designed for factories, not for the human biological clock. Circadian helps you reclaim the timing your body already knows."
Start living in sync
Free to install. No account. No data sent anywhere.