About Pulse

Pulse is a free sound therapy web app. It synthesizes pure tones and amplitude-modulated frequencies directly in your browser — no downloads, no accounts, no servers playing audio at you. The synthesis happens on your device, runs through whatever you're listening with.

I built it because I wanted a tool that took sound seriously without overclaiming. Most sound therapy apps make big promises and back them up with vibes. Pulse takes a different approach: honest about what the research supports, honest about what's cultural tradition, honest about what's experimentation.

What's in it

Seven categories of frequencies, drawn from research literature and sound healing tradition:

• Sleep — delta frequencies, slow-wave envelopes
• Meditation — theta-band frequencies including the Schumann resonance
• Calm — alpha frequencies for relaxation and rest
• Focus — beta-band frequencies for active wakefulness
• Healing — frequencies explored in clinical research on pain and the body
• Solfeggio — the modern set of frequencies from sound healing tradition
• Earth & Cosmic — Schumann resonance harmonics

Each frequency has its own page describing what it is, what's been studied, and what's traditional rather than research-backed.

How to use it

Pulse works on any device with a browser and audio output. A few use cases that work well:

• As a bedroom appliance. Repurpose an old phone connected to a powered subwoofer. The sub delivers the low frequencies in a way headphones can't.
• With headphones for binaural presets. A few of the presets are designed for binaural delivery and require headphones to work as intended (look for the 🎧 indicator).
• As a companion to meditation, breathwork, or sleep. Pulse plays alongside whatever you're already doing.

You can install Pulse to your home screen by tapping Add to Home Screen from your browser menu. It then works like a native app, offline.

What it is, what it isn't

Pulse is sound. It's not a medical device, it doesn't make diagnostic claims, and it isn't a substitute for medical care. If you're using it for a specific concern, talk to a healthcare provider too.

The descriptions throughout the app try to be specific about what's known and what's traditional. Where there's published research, it's cited. Where claims are cultural tradition, that's named explicitly. The goal is honest curation — neither dismissive of the traditions nor overstating the evidence.

Who made it

I'm a software developer living in Edmonton, Alberta. I've been using sound for sleep and meditation for years and wanted better tools than what the wellness app market offers. Pulse is the result.

This is a small, slow-burn project. There's no company behind it, no investors, no growth targets. If you find it useful, I'd love to know. If you have questions or feedback, the contact page is the way to reach me.