Qi Clock Align with the 12-hour organ cycle Caffeine Tracker Know when your coffee clears

Interactive Tool Caffeine × 子午流注

Caffeine Half-Life Tracker

Add your drinks below. The tracker uses the 5.7-hour half-life model to show exactly how caffeine moves through your 24-hour organ cycle — and when it starts interfering with sleep.

Peak Level —mg

At 23:00 Sleep —mg

Clears 50mg —

申時 15–17h —mg

Also try Bio-syncing Qi Clock → Map your entire daily rhythm to the 12-hour organ cycle — beyond just caffeine.