We have covered plenty of quality microphones for iOS devices in the past. You are going to need a high quality microphone to record high quality audio. The Shure MV5 happens to be a digital condenser microphone MFi certified for iOS devices. It has 3 DSP modes (vocals, flat, and instrument). The microphone automatically applies gain, EQ, and compression for better results.
Shure MV5 offers real-time monitoring. You get an anodized aluminum desktop stand for your purchase. This microphone could prove useful for music, podcasting, and chatting. Sets you back under $125.[where to get it]