Shannon is a southern gospel singer and they sing in 4 track harmony. He's looking for good software that can balance the volume and gain when recording separately during a live performance. Leo says that all recording software has that capability, and he can always use hardware to do it with a Telos compression/expansion module. It also protects against popping and clipping. Audacity is free and he could find a plugin for it that can work. It's available on all platforms, too. There's also the Levelator from the Conversations Network. Very popular with podcasters. Sox from Sourgeforge is another option.
On your phone - Ophonic. You can record and then edit on the cloud.