Free tools that decode your sleep — caffeine timing, chronotype, sleep debt, and more. Built on peer-reviewed science, not vibes.
Each one solves a specific sleep question in under 2 minutes. Pick your problem.
Lion, bear, wolf, or dolphin? 15 questions to find your type and a daily schedule that actually fits your energy.
When's the last safe time for coffee? Enter your bedtime and habits, get a specific cutoff time with a decay chart.
Log your last week. We'll show your total debt and the cognitive hit — 7 days of 6hrs ≈ legally drunk.
Time in bed vs. time asleep — the metric sleep clinics actually use. See if you're above or below the 85% mark.
Should you nap? How long? When? Based on your wake time, energy dip, and the circadian forbidden zone.
Flying across zones? Get a day-by-day plan — light exposure, melatonin timing, and when to force yourself outside.
Each calculator tackles one specific sleep question. Start wherever you're curious.
Bedtime, wake time, coffee intake — quick inputs. Most take 30–60 seconds.
Not generic tips. A specific, personalized result backed by the actual study.
Every formula comes from a peer-reviewed paper. Not a wellness blog, not a mattress company's content team. Actual science.
New tools shipping regularly. Here's what's on the roadmap.
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