If you like the sound of a studio condenser microphone, the Sennheiser MK 4 Digital is a portable and professional microphone for connecting to iOS devices.

The MK 4 Digital is a studio condenser microphone that records into any audio app (such as Apogee MetaRecorder), video app, or live-streaming app on a Lightning-connected iOS device (iPhone, iPod Touch, or iPad).

I usually don't recommend condenser microphones for podcasters because of typically noisy podcast “studios”—heating/ventilation/air conditioning, computer fans, appliances, etc. However, because the MK 4 Digital connects to any iOS device, you can make a noise-free “studio” out of any space you can take your mic and iPhone, iPod Touch, or iPad.

Expect the Sennheiser MK 4 Digital Studio Condenser Mic for iOS in summer 2016, priced around $400. Read Sennheiser's announcement for more information.