Every tool uses peer-reviewed sleep science. Every calculation stays in your browser. Pick one and start sleeping better tonight.
Enter your wake-up time. Get five optimal bedtimes based on 90-minute cycles.
Most PopularTell us your current habits and how you feel. We will recommend a bedtime shift.
PlanningCalculate the perfect nap length and timing. Avoid sleep inertia.
Quick FixLog your sleep and see accumulated debt. Get a realistic repayment plan with charts.
Tracking10-question assessment covering latency, efficiency, and daytime function.
AssessmentPlan your gradual schedule shift before travel. Export the plan to your calendar.
TravelEvery formula is based on published research from sleep medicine journals.
No accounts. No servers. No data collection. Everything runs in your browser.
Every tool generates live Canvas/SVG charts. Save, export, or screenshot them.
Real experiments, real data, no BS.
Mike snored at 68 decibels. That is louder than a vacuum cleaner. Here is what worked for us before the CPAP machine.
My husband Mike snored for years. Then he stopped breathing. Here are the signs I missed and the test that saved us.
Leo begged for one more episode at 8 PM. I said yes once. He was awake until 10:30. Here is the screen time rule that works.
At 11:47 PM my brain decides to solve every problem I have ever had. The brain dump method cut my sleep latency from 47 to 12 minutes.
I was 34 weeks pregnant with Leo and sleeping in 47-minute chunks. Here is what actually helped, backed by OB-GYN research.
TikTok says tape your mouth shut for better sleep. My ENT colleague says that is a great way to end up in the ER.