{
 "name": "Sundial: Body Clock",
 "tagline": "Your body clock has a needle: the time your core temperature is lowest",
 "description": "Your body clock has a needle: the time your core temperature is lowest. Light before it delays the clock; light after it advances the clock. So \"get morning sun\" is right at home on your usual schedule, and backwards on the first morning in a new time zone or after a weekend sleep-in.\n\nSundial estimates where that needle is from your Apple Watch sleep and heart rate during sleep, and looks only at the gap to where you want it.\n\n■ Three situations, one mechanism\n• Trips: shift your sleep step by step for a few days before departure; after arrival, get windows for seeking and avoiding light in local time. Eastward and westward are different jobs, and it knows.\n• Shift changes: from the last day of your old shift, use your days off to move gradually. Enter working hours and it can start on work days too.\n• Daily life: only on a morning your needle has drifted (say, after a weekend), you get a timetable to bring it back. On aligned days: \"Today is free.\"\n\n■ A five-line timetable\nSeek/avoid light, wake and bedtime, first and last bite, exercise window, bath. All computed from your needle for that day only.\n\n■ No assumptions\nIt doesn't assume you wake at 7. Your baseline is learned from your own last 14 wake times. Night owls and late shifts keep their own life as the baseline.\n\n■ Your data stays on your device\nApple Health data and everything computed from it stay on your iPhone. No server. No ads, no tracking. Every feature is free for individuals.\n\n■ Evidence\nNeedle = core temperature trough, 3–4.5 h before waking (Eastman & Burgess 2009). Light phase response (Khalsa 2003), exercise phase response (Youngstedt 2019), meals and peripheral clocks (Wehrens 2017), pre-flight adjustment (Burgess 2003). Sundial is not a medical device and does not promise to cure jet lag.\n\nApple Watch (sleep tracking) recommended. Without a Watch, enter your usual wake time and the timetable still works.",
 "url": "https://debuts.app/apps/sundial-body-clock",
 "category": "Health and fitness",
 "platforms": [
  "iPhone and iPad"
 ],
 "pricing": "free",
 "use_cases": [],
 "audience": [],
 "links": {
  "app_store": "https://apps.apple.com/us/app/sundial-body-clock/id6816400323",
  "google_play": null,
  "website": "https://menufyjp.com/sundial/"
 },
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 "claimed": false,
 "verified": false,
 "maker": "Ryosuke Hoshino",
 "upvotes": null,
 "followers": null,
 "rating": null,
 "ratings": 0,
 "awards": [],
 "launches": [],
 "ai_ready": 78,
 "badges": {
  "launched": "https://debuts.app/badge/sundial-body-clock?type=launched",
  "award": "https://debuts.app/badge/sundial-body-clock?type=award",
  "rating": "https://debuts.app/badge/sundial-body-clock?type=rating"
 }
}