How to convert pcm/wav to mp3?

I'm using a virtual recorder to record voices and it records in the .pcm file format. I found an app freemp3droid to convert it to .mp3 but there are some bugs in the app and it has not been updated recently. Is there any other app to convert the file into .mp3 or, should I look for a new voice recording app that doesn't use .pcm?