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Schedules on Circadian Rhythm

iPhone and ⌚️app

Life on Earth is adapted to the rotation of our planet. Humans have an internal biological clock that helps them anticipate and adapt to the regular rhythm of the day, namely circadian rhythm. Scientific research has shown the importance of circadian rhythm for human health, and led to a Nobel Prize in Physiology or Medicine in 2017. It is studied at many prestigious organizations such as University of Oxford, Harvard Medical School, Brandeis University, Rockefeller University and Salk Institute.

Tempori is an innovative iPhone and Apple Watch app that helps you schedule several basic daily activities, based on general circadian rhythms determined by daylight. It informs you which of those activities are suitable at anytime during a day, and lets you set constrained schedules intuitively. You can study year-round daylight conditions at the current location interactively. The watch app tracks suitability of the activities continuously. In both iPhone and watch apps, you can record health activities and save data into the Health app.

If you subscribe to premium features, you can study daylight conditions, daily temperature range and precipitation anywhere in the world, as well as hourly temperatures in US. You can set up travel plans on a map, and the watch app will help you prepare for jet lag by automatically shifting schedules in the few days before the trip. Personal activity data in the Health app will be visualized with relevant schedules, for convenient comparison. These include sleep analysis, heart rates, dietary energy intake, caffeine intake, environmental and headphone sound levels, workouts, mindful sessions, toothbrushing and handwashing events. Further, some health data are analyzed and visualized separately, to provide insights and guidance. These include heart rates, heart rate variability (HRV), Poincaré plot, sound levels, and body mass index (BMI). Through the iPhone camera, Tempori can recognize food text and images, provide nutrient information, including mercury levels of popular fish. You can measure correlated color temperatures of light sources. Watch face complications offer gentle hints of the most important activity at anytime. In addition, the watch app detects if you have gone to bed at scheduled bedtime, by heart rates and motion. If not, it will notify you.

Tempori offers novel interaction design, while taking advantage of and enhancing watch's essential function: timing. The approach of better timing for health and productivity is simple but effective. Tempori will help you build healthy habits, with your determination and patience.

Terms of Service

Privacy Policy

Tempori does not collect and store any personal data from users. Approximate location is required to determine sunrise and sunset time, while using the iPhone app. Tempori is integrated with the Apple Health app. All location and health data stay on the user's device.


  1. The Body: A Guide for Occupants, 2019.
  2. Circadian Code: Lose Weight, Supercharge Your Energy, and Transform Your Health from Morning to Midnight, 2018.
  3. When: The Scientific Secrets of Perfect Timing, 2018.
  4. The Fasting Fix: Eat Smarter, Fast Better, Live Longer, 2020.
  5. Tick Tock: Your Body Clocks, 2018.
  6. American Heart Association.
  7. Travelers' Health.
  8. Dietary Guidelines.
  9. Food Safety and Nutrition.
  10. When We Eat, or Don’t Eat, May Be Critical for Health, 2018.
  11. Don’t Visit Your Doctor in the Afternoon, 2019.

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