iOS recording app recommendations needed

App Developer

Hi all,
I'm looking for an IOS app that will set gain automatically by listening during record-pause mode. I'd settle for a really good implementation of auto-gain, but some hardware recorders take the smarter approach of setting the levels based on a sample of sound acquired during pause mode, rather than riding the gain constantly throughout the recording. Y'all know of any accessible IOS apps that do this?
If none exist, one of you coder types should go write one immediately and bring it back here. I'll wait;)

I've been using Audio Memos and Voice Memos. Other recommendations that support setting levels on external USB mics are welcome. My searches aren't really turning up things effectively on this one for some reason.