In order to record high quality audio on your smartphone, you could always use a better quality microphone. The Shure MV51 Condenser Microphone can help. It is Apple MFi certified, so you can connect it to your iOS device directly to record speech, music, and everything in between. The front panel touch controls let you change mode, headphone volume, microphone gain, and other settings.
The Shure MV51 Microphone has a headphone output for real-time monitoring. It is compatible with iPhone, iPad, and iPod Touch devices. Sets you back under $200.