Are you a natural morning lark or do you hit your stride after midnight? Chronotype affects when you are most alert, productive, and creative. 10 quick questions, about 3 minutes.

When are you at your best?

Your chronotype is your natural preference for when to sleep and when to be active. It's influenced by genetics and affects your energy levels, cognitive performance, and mood throughout the day.

The four chronotypes are often described using animals:

  • Lion — early riser, most productive in the morning
  • Bear — follows the solar cycle, productive mid-morning
  • Wolf — night owl, most productive in the evening
  • Dolphin — light sleeper, irregular sleep patterns

About this concept

Michael Breus popularized the animal-based chronotype model in his 2016 book "The Power When." It builds on decades of research in chronobiology — the study of biological rhythms.

Research shows that matching your schedule to your chronotype can improve:

  • Sleep quality
  • Cognitive performance
  • Mood and emotional regulation
  • Physical health
This assessment helps you identify your chronotype and understand when you're likely to be at your best. You can use it to plan your day around your natural rhythms.

Result Interpretation

After completing the 19 questions, you'll receive an immediate, detailed report with:

  • Your score — calculated automatically based on your responses
  • Score interpretation — what your score means in practical terms
  • Context — how your results compare to general population norms where available

All results are displayed on screen. No account or login needed.