Rode VideoMic Me
The VideoMic Me from RODE is a compact and lightweight directional microphone that connects directly to the iPhone TRRS microphone/headphone socket. It can be used to capture audio for primary camera or front camera (selfie) use with its flexible mounting bracket and will accommodate a wide range of smartphones.
The VideoMic Me features a 1/8" (3.5mm) headphone jack on the rear that allows for play-through of audio while recording (app dependent) as well as easy playback of your videos without having to remove the mic. It includes a deluxe furry windshield for shooting outdoors or in adverse weather conditions.