Understand your sleep. Improve your nights.
Explore the science behind dreams and sleep. Use browser-based tools to optimize your sleep cycles, fall asleep faster, and wake up refreshed.
Science-based tools for better sleep
Apply sleep science to your daily routine with these browser-based utilities.
Calculadora de Ciclos de Sueño
Descifra tus ciclos de sueño. Encuentra horarios óptimos basados en la ciencia de los ciclos de 90 minutos.
Calculadora de Corte de Cafeína
Descubre cuándo dejar la cafeína para mejorar la calidad del sueño. Basado en la ciencia de la vida media.
Temporizador de Siesta
Descifra la ciencia de las siestas. Temporización basada en evidencia para evitar la inercia del sueño.
Sleep Debt Calculator
Track your weekly sleep deficit and get a personalized recovery plan.
Jet Lag Planner
Get a personalized light exposure schedule to adjust to new time zones faster.
Chronotype Quiz
Discover your sleep chronotype and ideal daily schedule in 2 minutes.
Ejercicio de Respiración
Guided breathing patterns to calm your nervous system before sleep.
Ruido Blanco y Sonidos para Dormir
Steady background sounds to mask disruptive noise and improve sleep quality.
Clear trust signals, not vague claims
A simple nighttime workflow
How RestKit stays free
The site is built to stay usable before monetization gets in the way. That means the ad plan is explicit instead of buried.
- No ads inside calculator results, breathing controls, or active sound controls.
- No ad placements on privacy, cookie, terms, or contact pages.
- Ads may appear after the main content block on long pages and between non-critical sections on informational pages.
We do not rank tools or articles based on sponsorship, and we do not present these tools as medical diagnosis or treatment.