Download of Pero 1.8.0 for Mac was on the developer's website when we last checked. We cannot confirm if there is a free download of this app available.
Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. This free Mac app is a product of PE Lnc. Pero for Mac lies within Lifestyle Tools, more precisely Entertainment.
From the developer:
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.
You may want to check out more Mac applications, such as Expert Lotto 5, Get Tube Lite or DEAViewer, which might be similar to Pero.