A free app for Android, by KonashOne.

DJ Remix Mixer – Dj Music Pro is a music player for Android devices. The application allows you to mix, edit, and remix your own music, as well as play it in the background. It supports all popular formats, including MP3, WAV, FLAC, and more.

How to use it?

To start using the app, you need to install it. You can download it from the Google Play Store. After installing it, you need to open it. It is very simple to do this, just press the Home button. After opening it, you need to select the device you want to use.