Convert video or audio to mp3 is a free Android application developed by 심플앱스. This multimedia software offers a range of features that allow users to extract audio from videos, create custom ringtones, convert audio formats, control audio quality, volume, speed, and even reverse audio.

With the added functionality of audio merge and mixing, users can easily combine multiple audio files into one and create unique compositions. The application also provides options for fade-in and fade-out effects for ringtones, giving users the ability to customize their phone's sound settings.

Whether you need to convert a video file to mp3, create personalized ringtones, or enhance audio quality, Convert video or audio to mp3 has you covered. Its user-friendly interface and comprehensive set of features make it a valuable tool for any multimedia enthusiast.