Your optimal daily schedule
Enter your wake and sleep time plus your chronotype. The schedule engine calculates every major daily activity — coffee, deep work, exercise, meals, and sleep — from the underlying biology, not convention.
How the schedule is built
Every item in the schedule is derived from a specific biological mechanism, not from general productivity advice. Here is the reasoning behind each recommendation.
Coffee timing and the Cortisol Awakening Response
Drinking coffee the moment you wake up is one of the most common productivity mistakes. During the first 45–60 minutes after waking, your body produces a sharp cortisol surge known as the Cortisol Awakening Response (CAR). Cortisol is a natural stimulant — and it directly competes with caffeine for the same adenosine-blocking mechanisms. Consuming caffeine during this window blunts the effect of both. Waiting until the cortisol curve begins its downward slope (roughly 60–90 minutes after waking) allows caffeine to produce its full stimulant effect while also preserving your sensitivity to it.
Deep work and your cognitive peak
Each chronotype has a characteristic cognitive peak — the period when working memory capacity, sustained attention, and analytical processing are all elevated simultaneously. For Lions, this arrives by mid-morning. For Wolves, it does not arrive until late afternoon or early evening. The schedule blocks your most cognitively demanding work — strategic thinking, complex writing, coding, analysis — around your peak, not around calendar convention.
Exercise and core body temperature
Physical performance follows core body temperature, which follows a predictable circadian curve. Reaction time, grip strength, and cardiovascular efficiency all peak when core temperature is highest — typically in the late afternoon for most chronotypes. The schedule places exercise within two hours of your temperature peak. Morning exercise has its own benefits (cortisol activation, circadian entrainment via light), but peak performance work is best done in the afternoon window.
The meal cutoff and sleep quality
Eating within three hours of sleep onset activates digestion and raises core body temperature, both of which impair the sleep onset process and reduce the proportion of slow-wave sleep in the early night. Slow-wave sleep is the phase during which growth hormone is secreted and memory consolidation for declarative facts occurs. The three-hour eating cutoff is not about weight — it is about sleep architecture.
Screen cutoff and melatonin onset
Short-wavelength blue light (470nm peak) directly suppresses melatonin production via ipRGC retinal cells connected to the suprachiasmatic nucleus. This is not a minor effect — laboratory studies have demonstrated that bright screen exposure in the two hours before bed can delay melatonin onset by 90 minutes and reduce melatonin peak by up to 50%. The schedule places screen cutoff 90 minutes before your target bedtime.