A DAY THAT FEELS MORE LIKE YOU
Plan with the rhythm you notice.
Some hours feel easier than others. Sketch the rhythm you notice, then use it to give demanding work a thoughtful place in your day.
A few clues from your day
Your answers shape the sketch
These are our own short preference questions, not a validated chronotype questionnaire. The curve uses an illustrative formula, not a measurement or biological forecast. Try the plan, notice how you feel, and change it. No ideal schedule fits every day.
Only the values needed to calculate your plan go to Helibrain's test service. No calendar connection, names or event titles are needed.
The thinking behind this tool
Research describes time-of-day differences and an afternoon dip for some people, even without lunch. It doesn't validate this curve's shape or suggested times. Caffeine is shown as context only; the tool never assumes a drink will improve your work.
- Schmidt et al. (2007) · A time to think: circadian rhythms in human cognition ↗
- Monk (2005) · The post-lunch dip in performance ↗
- EFSA (2015) · Caffeine: how the body processes it ↗
Sources checked 5 November 2026 · By the Helibrain team
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