Sereno: AI Stress Tracker

Research-backed stress tracking that follows live shifts, catches stress spikes in the moment, and reads 20+ signals, not just HRV.

Sereno helps you understand stress while it is happening, not only after the day is already gone.

Most stress apps lean heavily on HRV alone. Sereno does not.

Sereno reads 20+ signals across Apple Watch, Apple Health, sleep, recovery, heart rate, resting heart rate, activity, context, and change over time to build a more complete picture of what your body is going through. Stress is not one signal. It is a pattern.

That means Sereno can do more than show a static score. It can follow stress continuously through the day, detect sudden stress spikes, and surface guidance when a hard moment is actually unfolding.

So when your body is under pressure, Sereno is built to reflect that reality, not to tell you everything looks calm when it clearly does not.

WHY SERENO FEELS DIFFERENT

• Reads 20+ signals, not just HRV
• Monitors stress continuously across the day
• Detects sudden stress spikes as they happen
• Helps separate exercise, recovery, sleep, and physiological strain
• Learns your personal baseline over time
• Shows what changed, what may be driving the shift, and what to do next
• Turns weekly history into readable patterns
• Creates doctor-ready summaries you can share when you choose

BUILT FOR REAL MOMENTS

Stress does not always build slowly. Sometimes it rises in minutes.

If strain starts climbing sharply, Sereno can detect that shift and surface it early and help you respond with a steadier next step.

MORE THAN HRV

HRV matters, but it is not enough on its own.

Sereno is built around the research-backed reality that stress and recovery are multi-signal phenomena. Heart rate, resting heart rate, sleep quality, overnight recovery, activity load, and daily context all help shape how the body responds.

UNDERSTANDS THE DIFFERENCE BETWEEN STRESS AND EFFORT

A hard workout and a hard day can raise similar signals for different reasons.

Sereno looks at exercise, recovery, and surrounding context so rising strain is less likely to be misread as the wrong kind of event. That helps reduce false alarms and makes the signal easier to trust.

BUILT AROUND APPLE WATCH

Sereno works with Apple Watch from day one.

Your watch helps power continuous stress context, spike detection, guided breathing, quick logs, sleep-aware reads, and day-in-review summaries.

NOT JUST SCORING. GUIDANCE.

A score without context is easy to misread.

Sereno helps you understand what changed, what helped, what raised the load, what looked different from your normal range, and when recovery is finally giving you room again.

And when the moment calls for it, Sereno can guide you into a steadier next step with interventions like breathing, grounding, and quick in-the-moment logging.

WEEKLY INSIGHT, NOT JUST DAILY SNAPSHOTS

Over time, Sereno helps you see which days keep running hotter, which habits repeatedly push you higher, when sleep is helping, when recovery is lagging, and when a harder pattern is starting to repeat.

DOCTOR-READY SUMMARIES

When you want to share the bigger picture, Sereno can generate structured summaries from your recent history.

BUILT ON PUBLISHED RESEARCH

Sereno is built on published research across autonomic physiology, HRV, stress regulation, sleep, and recovery.

Sereno is not a diagnosis tool and does not replace medical care. It is a translation layer for the signals your body is already producing.

PRIVACY

Sereno is built on Apple Health, not on surveillance. Your personal health data stays under your control. Reports and summaries are only shared when you choose.

PREMIUM

Sereno Premium unlocks deeper weekly readings, richer pattern history, and doctor-ready summaries.

TERMS

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