Stress Load
A daily educational estimate built from the context available right now—shown as one clear number with its strongest contributors.
Sleep Caffeine Movement Body signals
Stress & recovery, made understandable
Understand your stress.
Improve your recovery.
Cortly brings sleep, movement, lifestyle context and Apple Health signals into one calm daily view—then explains what may be shaping your day.
Works with iPhone Better with Apple Watch Local-first health data
How it works
Three ideas keep Cortly calm.
No score-chasing, no generic benchmarks—just a clear picture built around you.
01One daily view
See your Stress Load without digging through raw sensor data.
02Your own baseline
Understand changes against your patterns, not a generic person.
03Clear boundaries
Educational context, never a diagnosis or cortisol measurement.
A focused daily loop
From scattered signals to a useful next step.
Cortly keeps the product simple: review today, understand the strongest factors, then make one realistic adjustment.
Recovery context
Sleep, caffeine, alcohol and movement interpreted together, not as isolated numbers.
Personal patterns
Trends grow more useful as your personal baseline develops.
Focused Coach
Plain-language guidance grounded in your recent Cortly context—never generic advice copied from the internet.
Progress without score chasing
See the pattern, not just the number.
Stress Load, sleep and recovery signals become a coherent timeline. Weekly views use calculated daily estimates and personal Apple Health trends—not a single mood answer stretched into a chart.
- Daily levers and body signals
- Weekly Stress Load and sleep trends
- HRV and resting heart rate against your baseline
Transparency built in
Know what shaped the estimate.
Data Coverage separates available, missing and contextual signals. Breakdown explains the strongest contributors without pretending a wearable directly measures cortisol.
How wearable stress signals work
1
Calm daily view, every metric in context
100%
Core data stored locally on your device
0
Diagnoses, scores to chase or medical claims
Sensitive context deserves restraint
Local-first by design.
Core data stays on deviceCheck-ins, lifestyle logs and HealthKit-derived values are stored locally.
Apple Health is optionalManual check-ins remain available without a wearable.
No medical claimsCortly offers educational estimates, not diagnosis or treatment.
Coach is your choiceCompact context is sent only when you use the AI Coach.
Cortly journal
Understand the signals behind the screen.
How to understand stress and recovery signals from your Apple Watch
HRV, resting heart rate and sleep can provide useful context—but none tells the full story alone.
Read the articleNow on iPhone
A calmer way to understand your day.
Download Cortly AI on the App Store and turn scattered signals into one clear daily view.