Pero

Pero is an application that plays white noise. The white noise is full of vibration frequencies that the human ear can hear, and can help a person relax or sleep.

Also, when you need to concentrate on work and there are always complicated sounds around, you can use white noise to mask it.

In Pero, you can hear spring rains, thunderstorms, oceans, nights, summer cicadas, temples, forests, waterfalls, wheat waves and many other white noise that can make you calm and relax.