hz

A simple, no-nonsense web app for restorative audio therapy

Important

iOS audio fixed 🎉 (thanks Cursor)

Note

This app is currently in development and may not work as expected. If you find any issues, please report them in the issues section.

What it does

• Restorative Tone: Deep, pure sine wave tones (20-100Hz) with a timer (30s, 1min, or 5min). Think grounding, low-frequency sound.
• Brown Noise: A deep, airplane-cabin-style rumble that plays indefinitely. No timer, just continuous soothing noise.

Features:

• Switch between tone and brown noise modes
• Adjustable timer presets for the tone
• Reset button to restart the timer
• Light/dark mode toggle (your preference is saved)
• Works entirely in your browser - no downloads, no accounts

Run it locally, if you must

Option 1: Download ZIP

1. Download this repo as a ZIP and extract it
2. Open a terminal and cd into the folder
3. Run npm install then npm run dev

Option 2: Git Clone

git clone https://github.com/zakagain/hz.git
cd hz
npm install
npm run dev

Then open http://localhost:5173/hz in your browser.

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© 2025 zakagain. Licensed under the MIT license.