About
A Quiet Place
Within the Noise
In a world filled with noise, the mind rarely finds space to breathe. Yuzen was created as that space.
Inspired by the calm simplicity of Zen aesthetics, Yuzen invites you to explore your inner universe through carefully crafted sound environments. Not as a productivity tool. Not as a habit tracker. But as a sanctuary — a space where sound becomes a guide back to yourself.
Each universe represents a different inner state. A flowing stream for focus. Gentle rain for reflection. Soft ocean waves for rest. These are not random choices. They are studied, intentional, designed to meet you where you are and guide you somewhere quieter.
The idea came from a personal frustration. After years of trying every sound and wellness platform on the market, the founder — YEN JUNG SU — kept returning to the same problem: the tools that were supposed to create calm were themselves cluttered, gamified, and designed to pull you back in. They felt like the opposite of what they promised.
Yuzen is both a journey inward and a place to rest. Welcome to your Inner Sound Universe.
What We Believe
Calm by Design
Every element of Yuzen — from the sound environments to the interface — is engineered to reduce cognitive load, not add to it.
Science-Informed
Our sound environments are built on research in psychoacoustics, sleep science, and breathing physiology — not just intuition.
Depth over Breadth
We chose 15 carefully crafted environments over hundreds of generic tracks. Quality of attention matters more than quantity of content.
Honest Technology
AI personalization in Yuzen exists to help you find what you need faster — not to create dependency or maximize screen time.
The Developer
Yen Jung Su
Founder & Developer
Yuzen is an independent project, built entirely by one person. Yen Jung Su designed, developed, and shipped every part of the app — the sound environments, the AI personalization engine, the breathing practice, and the emotion journal.
The app is available on iOS and Android. Feedback, questions, and suggestions are always welcome.
Experience It Yourself
Fifteen sound environments. Free on iOS and Android.