Travel breaks routines in ways your wearable rarely explains.
daygauge can show how time-zone shifts, sunlight windows, meal timing and movement changed your sleep and recovery pattern.
Start with the signal your own data can support.
Jet lag searches spike because users want practical timing help before and after travel.
daygauge can become useful here by connecting the whole day: flight, time zone, outdoor light, meal timing, caffeine, alcohol, steps and sleep midpoint.
daygauge can detect time-zone changes and compare sleep midpoint, wake time, outdoor windows, meal timing and recovery proxy after travel.
What this page covers.
From research context to product evidence.
What a user should expect to see in the app.
Arrival day: 5 time zones crossed; sleep midpoint still 3h 20m closer to home time.
Weekly review previewdaygauge can detect time-zone changes and compare sleep midpoint, wake time, outdoor windows, meal timing and recovery proxy after travel.
Confidence rises when the same pattern repeats against your own baseline and drops when key signals are missing.
daygauge would suggest one small experiment, then watch whether the evidence repeats over the next week.
Research context only. daygauge does not diagnose, treat, prevent or predict disease risk. Personal medical concerns belong with a qualified clinician.
Evidence 1
Arrival day: 5 time zones crossed; sleep midpoint still 3h 20m closer to home time.
Evidence 2
Outdoor timing: first local-morning light window happened at 11:40, later than target routine.
Evidence 3
Recovery: resting HR +5 bpm after late flight, alcohol and short sleep.
Safety line
Research context only. daygauge does not diagnose, treat, prevent or predict disease risk. Personal medical concerns belong with a qualified clinician.
Sources daygauge can cite without overclaiming.
These sources are used as context for product wording and evidence labels. They should not be turned into personal disease-risk estimates.
- CDC Yellow Book jet lag disorder
- NCBI Bookshelf CDC Yellow Book jet lag
- NASA 2024 jet lag, sleep timing and sleep inertia
Research context only. daygauge does not diagnose, treat, prevent or predict disease risk. Personal medical concerns belong with a qualified clinician.
What daygauge should not claim.
Related daygauge guides.
Want daygauge to explain what travel does to your rhythm?
Join the TestFlight waitlist and tell us which pattern you want daygauge to explain first.
iOS TestFlight first · paid app, one plan · evidence context, not medical advice