Sleep Insights places optional Apple Health sleep data beside your rota. Fatigue Guard uses on-device rules and schedule context to surface planning signals. Neither feature is a diagnosis, a safety clearance or a substitute for medical advice.
Two stretches with the same number of workdays can feel very different when one contains nights, extra hours or short gaps. Viewing sleep context beside the actual rota can help you ask better questions about recovery, without treating a single score as the answer.
Connect sleep data only when you choose
Sleep Insights uses Apple Health sleep information with your permission. The App Store describes this as read-only access. Core schedule planning does not require you to connect Health.
Review the permission request and share only the categories you intend to use. Revoking Health access affects future access; it should not be assumed to erase every already-created local summary. Follow the app’s and Apple’s data controls when managing stored information.
Read trends alongside the work block
Use the schedule to place sleep records in context: nights, rest days, swaps and longer work stretches. A single short record may have a different meaning from a repeated pattern.
Basic sleep context is distinct from Pro’s advanced comparisons and deficit warnings. Missing records, device wear and incomplete Health data can affect what the app can show. A blank night is not proof of no sleep.
Understand what Fatigue Guard does
Fatigue Guard is a deterministic on-device layer built from available sleep trends, recovery context and upcoming rota load. It can identify a date to review and explain the factors behind its signal.
The purpose is awareness and earlier planning. Reviewing a shift block or considering a swap is different from receiving a medical recommendation. No clinical validation or measured reduction in incidents is claimed here.
Do not turn a signal into a safety decision
A low score cannot establish that you are fit to drive, operate machinery or carry out safety-critical work. Pay attention to symptoms, workplace procedures and professional advice rather than relying on an app to clear you.
For persistent sleep difficulties or concerning symptoms, consult a qualified healthcare professional. NIOSH specifically advises not driving when very sleepy; choose a safer way home.
Feature FAQ
Do I have to connect Apple Health?
No. Health access is optional. Your shift rota remains usable without sleep records.
Does Fatigue Guard use a cloud AI diagnosis?
No. The advertised fatigue layer uses deterministic on-device analysis and is not a diagnostic service.
Can a low fatigue signal guarantee I am safe to drive?
No. It cannot assess driving safety or fitness for duty. Do not drive when very sleepy.