About Stillsea

Our Mission

Stillsea exists for one reason: to make science-backed breathing exercises accessible to everyone, everywhere, at no cost. We believe that something as fundamental as breathing well should never be locked behind a paywall, a subscription, or a required sign-up.

Stress, anxiety, and sleeplessness are increasingly common in modern life. Yet one of the most effective tools for managing these challenges is something we already do thousands of times a day — breathing. The difference lies in how we breathe. Research from institutions including Stanford University and numerous clinical studies has shown that structured, intentional breathing patterns can activate the parasympathetic nervous system, lower cortisol levels, reduce heart rate, and promote calm within minutes.

What We Offer

Stillsea provides a curated set of guided breathing exercises, each grounded in scientific evidence and clinical practice:

• Box Breathing (4-4-4-4) — Used by Navy SEALs and first responders, this equal-ratio technique is proven to reduce stress and sharpen focus under pressure.

• 4-7-8 Breathing — Developed by Dr. Andrew Weil, this extended-exhale technique helps calm the nervous system and is widely recommended as a natural sleep aid.

• Coherence Breathing (5-5) — A balanced rhythm designed to optimize heart rate variability (HRV) and promote physiological balance throughout the day.

Each exercise is delivered through an interactive, animated timer that runs entirely in your browser. No app to download. No account to create. Just open the page and start breathing.

Our Approach

We designed Stillsea around three principles:

1. 1

   Evidence first. Every technique on Stillsea is selected based on published research and clinical evidence. We do not promote unproven trends or pseudoscientific claims.

2. 2

   Simplicity over complexity. Breathing exercises work best when they are easy to follow. Our interface is minimal by design — a single visual guide, clear phase labels, and nothing else competing for your attention.

3. 3

   Free and open. All exercises are free to use. We sustain the project through non-intrusive advertising, so you never have to pay to breathe better.

Who We Serve

Stillsea is built for anyone who wants to feel calmer, sleep better, or manage stress more effectively. Our users include:

• People dealing with everyday stress and anxiety
• Those struggling with sleep onset or insomnia
• Students and professionals looking for quick focus techniques
• Athletes and performers training breath control
• Singers and musicians developing diaphragmatic support
• Anyone curious about the science of breathwork

A Note on Health

Stillsea is a wellness tool, not a medical device. The breathing exercises on this site are intended for general relaxation and wellbeing. They are not a substitute for professional medical advice, diagnosis, or treatment. If you have a respiratory or cardiovascular condition, are pregnant, or experience dizziness during practice, please stop and consult a qualified healthcare provider. For emergencies, call your local emergency number.

Get in Touch

We would love to hear from you — whether it is a suggestion, a question, or just to say hello. Reach us through our Contact page.