See it in action
Your current hour — good-for & avoid, at a glance.
Your whole day, planned across twelve hours.
Meridian is the 2,000-year-old circadian clock from the Huangdi Neijing — your body's built-in daily schedule, on your phone.
Coming to the App StoreNo account · No cloud · No ads · Your data never leaves your phone
At each hour, Meridian voice-reminds you what your body is best at and what to avoid — gently repeating the rhythm, hour by hour, until you know it by heart. Not forcing you to check a box, but teaching you your own natural clock.
子午流注 (zi wu liu zhu) divides the day into twelve two-hour windows, each governed by a different organ system. Traditional Chinese medicine has timed sleep, meals, work and rest by it for two millennia. Modern science now calls the same idea circadian rhythm — and won a Nobel Prize for it in 2017.
Twelve two-hour windows, each with clear good-for and avoid guidance. Know the best time to sleep, focus, eat, exercise and wind down — instead of guessing.
No account. No cloud. No tracking. No ads. Your plans and check-ins never leave your phone.
Daily check-ins, a compliance dashboard and a shareable schedule poster — a two-thousand-year-old framework wrapped in modern tooling.
Your current hour — good-for & avoid, at a glance.
Your whole day, planned across twelve hours.