Sereno
Realtime stress insight from 20+ signals
2 followers
Realtime stress insight from 20+ signals
2 followers
Sereno is a realtime stress monitor for iPhone and Apple Watch that reads 20+ signals, not just HRV, to show what changed, what may be driving the shift, and whether your body is dealing with exercise strain, poor recovery, sleep disruption, or something else.
Most stress apps reduce everything to a single number.
With Sereno, I wanted to take a different approach.
Sereno is a realtime stress monitoring app for iPhone and Apple Watch that reads 20+ signals across Apple Watch, Apple Health, sleep, recovery, heart rate, resting heart rate, activity, context, and change over time, instead of leaning on HRV alone. The goal is not just to say “stress is high,” but to make that signal easier to understand in a way that feels more grounded and useful.
The context part is really the core difference.
The same stress score can mean very different things depending on what is happening around it. A higher reading after a workout is not the same as a higher reading during a sedentary afternoon after poor sleep. A rising signal during recovery is different from a sudden spike during a difficult moment. With Sereno, I wanted to add that missing layer of context so stress is not flattened into one oversimplified label.
That is also why the app focuses on continuous monitoring, spike detection, separating exercise strain from other stress states, learning your personal baseline over time, and helping show what changed and what may be driving the shift.
Privacy is also a major focus for me.
I wanted Sereno to be built around Apple Health and Apple Watch data in a way that keeps the user in control. The goal was not to create something invasive, but something useful, personal, and respectful. Reports and summaries are only shared if the user chooses to share them.
I also wanted it to be research-backed rather than just another generic wellness score. Sereno is built around published research across autonomic physiology, HRV, stress regulation, sleep, and recovery. It is not a diagnosis tool and it does not replace medical care, but the goal is to make stress patterns more understandable while they are actually happening.
Would love feedback from people interested in:
Apple Watch health tracking
stress monitoring
privacy-conscious health apps
research-backed consumer health tools