Capacity Gauge reads your sleep, HRV, activity, and calendar on-device, calibrates against your rolling baseline, and shows a 90-day trend — so each morning you see a clear read on readiness. AI Capacity Insights (Pro, Apple Intelligence) adds on-device coaching from your last 14 days; the free tier includes one AI analysis per week so you can try it first.
Health and calendar data stay on your iPhone. Morning reminders nudge you to open the app for your real score after Health syncs. No account required.
Sleep data, HRV, activity, calendar events, and your readiness score are processed on-device using Apple Health and EventKit. AI Capacity Insights (Pro) runs with Apple Intelligence on-device when you use it — not on our servers. No account, no subscription required for core scoring and trends.
Core recovery signals from sleep and HRV in Apple Health, plus step data where it informs distraction and physical-load cues for your work pattern. Works with Apple Watch, Oura, Ultrahuman, Whoop, Garmin, and other wearables that sync to Health.
Counts meeting hours, context switches, and back-to-back blocks. Pick which calendars count so personal or sleep-tracker calendars do not skew your load score.
One 0–100 number with a plain-English status, a 90-day sparkline on the free tier, and scoring tuned so similar days show natural variation without leaving the realistic range. A warm-up indicator shows while your personal baseline is still forming; you can reset the baseline in settings when life changes.
Flags early wake, short sleep, and rough nights against your exponentially smoothed personal baseline — not generic population averages.
Every morning, 1–3 concrete suggestions from your score, sleep, and calendar. AI Capacity Insights (Pro, Apple Intelligence) adds deeper on-device coaching from your last 14 days; free users get one AI analysis per week to preview it.
Tell it whether you do deep focus work, mixed work, or mostly collaboration — and the calendar penalties adjust to what actually matters for your role.
Daily reminder timed from your projected wake-up, with score-aware copy. The notification does not spoil your number — open the app after HealthKit syncs for the real score. Low days surface a shortcut to the full breakdown.
Guides
Long-form reads on creeping burnout in knowledge work, and on turning sleep, HRV, and calendar load into a simple daily readiness practice — the same signals Capacity Gauge combines on your iPhone.
Burnout rarely hits overnight. For knowledge workers, creeping burnout builds through poor sleep, low HRV and overloaded calendars. Learn how to spot the early signs and protect your capacity.
Read the guideYou already capture sleep and HRV in Apple Health. Here's how to turn those numbers plus your calendar into a simple daily work readiness score, so you know when to push and when to rest.
Read the guide