Buy me a coffeeCalculate Your Peak Deep Work Windows
Stop forcing deep work when your biology is programmed to rest. Enter your wake-up time below to calculate your personal circadian alertness curve.
Your Daily Circadian Blueprint
5 Biological CyclesMorning Cortisol Awakening & Hydration
Get natural sunlight within 30 minutes. Delay heavy caffeine for 90 minutes to prevent afternoon crash.
Rising Energy (50% → 80%)Peak Deep Work Window #1
Your prefrontal cortex is at peak focus. Tackle difficult coding, writing, architecture, and hard problem solving.
Maximum Alertness (95% – 100%)Post-Lunch Dip & Recovery
Body temperature drops naturally. Perfect for 20-min power nap, walk outside, or low-stakes admin work.
Natural Trough (40% – 60%)Secondary Energy Rebound & Creative Window
Body temperature peaks. High creative intuition, great for meetings, brainstorming, refactoring, and collaboration.
Second Wind (80% – 90%)Melatonin Onset & Evening Wind-Down
Dim screens, avoid blue light, and shut down work tasks. Sleep latency is lowest when you sleep at the 16-hour mark.
Resting (30% → Sleep)Want Produchive to Balance This for You Automatically?
Manually checking the clock is distracting. The Produchive desktop app automatically maps your tasks onto your exact circadian curve, tracks desktop foreground apps, and alerts you when your peak energy window arrives.