I expected this to be similar to MP3Gain for Windows but the user interface is very sparse. The settings menu option is greyed out so I cannot change anything. Multiple files were not adjusted and showed an "!" instead of a green check, but there is no way to find out what the error was. Some of the files were recently purchased music & some were ripped from CDs. I emailed Seasoft tech support one of the files & they said there is nothing wrong with it. I haven't heard anything from them for several days. MP3Gain for Windows adjusted the same files with no errors. In its present state this app isn't worth buying.

Yet another program that doesn’t do what it promises. All I want to do is reduce the volume on an mp3 file, but not with this APP.

I record sermons at my church using a remote mic and a Zoom recorder. There are fans making a low humming sound in the background, so we record at a low volume to avoid picking up the hum. This app lets us quickly and easily increase the gain. It's so easy to use and does exactly what we need without having to launch a larger aplication and wade through the menus to get it done. Thank you!

Read carefully because I never rate an app.I have about 20K songs ripped from various CDs and downloaded over the years. Each at a different volume rate.MP3 Gain 4 is the simplest tool to normalize the output.It does what it says in the tin, no bells and whistles. It is simple to use, and the results are pretty good.What makes this app stand out from the rest is the customer service. I contacted them with some issues I had with my app (I'm not going to go into detail here) but, not only did they fix the problems, but they did it in lightning speed, and were very fast replying to my emails.These guys have a returning customer for life.Strongly recommended