Audulus 3 iPad download

Hi everyone, this is my first topic and I hope someone can help me. I wanted to download Audulus 3 on my iPad, since version 4 is not compatible with my iOS which goes up to 15.8.
does anyone know how I can do it? I found a site that seemed promising but it told me that version 3 is not available in my geographic area. I thank in advance anyone who would like to help me

Unfortunately version 3 is no longer supported and is not available for new purchases in the App Store. Version 4 is the only version currently available.

Thanks for the reply… I’ll wait to change the iPad