There is a tremendous difference between speaking directly into the phone when recording and utilizing the microphone. With the microphone, the sound quality is crisper and noticeably clear.
Plug and use, no any other application is required.
Also, the phone will not go to 'headphone mode' when plugging in Compatible with Apple iPhone, iPad, iPod Touch. BUT DSLR, camcorders, audio recorders, and any other Smartphone, PC NOT compatible. Clip-on Omnidirectional Microphone TRRS 3.5mm Jack Handsfree