True & real-time noise generator - No files with pre-generated noise.
The app can generate various color / types of noise.
Different people need different noises. For example one may find that brown noise helps with sleep disorders and for another white noise works better.
You can try different types of noises and find out which one can help you the best with sleep / work / etc.

Features:
★ True generated audio noise.
★ Many noise colors: purple (violet), blue, white, pink, brown.
★ Ability to mix noises sound.
★ Selection of natural or uniform noise sources.
★ Simplicity.
★ Volume controlled by physical buttons or in-app.
★ Handy notification controls.
★ Low battery usage.
★ Shutdown timer for sleep.
★ Great for relax / sleep / study.

How to:
Press big "Play" button and noise will be played, then you may stay in app or press home / back to continue playing.
You can change color of noise by clicking color-changing button on bottom. If you need more advanced control over noise you can click button with 'sliders'.
To set up time after which playing will stop you can click timer button.
"Natural RNG" section in advanced menu allows to select if source for noise maker is uniform or natural.

About colors / types.
Brown noise: (-6dB / octave) Sounds f.e. like strong waterfalls, low roaring, thunder.
Pink noise: (-3dB / octave) Sounds like rustling leaves, steady rain, wind.
White noise: uniform power distribution. Sounds like whirring fan, radio static.
Blue noise: (+3dB / octave) Sounds like high-pitched hiss of water.
Purple noise: (+6dB / octave) Basically higher-piched blue noise.

Disclaimer: This is not medical advice.