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.
Schlafzyklus-Rechner
Entschlüssele deine Schlafzyklen. Finde optimale Zeiten basierend auf der Wissenschaft der 90-Minuten-Zyklen.
Koffein-Stopp-Rechner
Finde heraus, wann du auf Koffein verzichten solltest für bessere Schlafqualität. Basierend auf Halbwertszeit-Wissenschaft.
Power-Nap Timer
Entschlüssele die Wissenschaft des Nickerchens. Evidenzbasiertes Timing zur Vermeidung von Schlafträgheit.
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.
Atemübung
Guided breathing patterns to calm your nervous system before sleep.
Weißes Rauschen & Schlafgeräusche
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.