Note from our iOgrapher inventor, Dave Basulto on mics:

If  you are interested in getting great audio from the shotgun microphone make sure you also get an audio cable. This is a necessity to making it work. If you are looking to use handheld microphones, wireless kits, or other XLR shotgun mics you will need an XLR cable, and either the iRig Pre or the Sennheiser XLR input. Our iOgrapher choices for mobile media case mics.

RØDE i-XLR digital XLR interface for Apple iOS devices
RODE Video Mic Go
Sennheiser MKE400 Shotgun Microphone
RODE SC7 TRS to TRRS Patch Cable
RODE SC4 TRS to TRRS Adaptor for iPhone or iPad
iRig Mic Lav
iRig Mic HD
iRig Voice
6ft Premier Series XLR Male to XLR Female 16AWG Cable
RODE SC6 2 Line Input/Output Breakout Box
Sennheiser E835 Dynamic Cardioid Microphone