I built Wombcore 3000, a web-based sound machine to soothe babies using pure Web Audio API—no external sound files, libraries, or build steps. It generates calming sounds like white/brown noise, heartbeat, ocean waves, and a gentle lullaby in real-time. Features include:

- Sleep timer (15/30/60 min) - Background audio support on mobile - Volume control - Fully responsive - 100% client-side – just open index.html

Live demo & source: https://github.com/taranntell/wombcore3000

Would love feedback on performance, sound realism, or ideas for new features. Thanks!

BTW: The web app continues playing sounds in the background on Android even after locking the screen. On iOS, this doesn’t work due to JavaScript execution being suspended when the device is locked.