The Tascam IM2X is a small iPhone/iPad sound accessory developed in order to improve and replace the built-in mic of the Apple devices and deliver superior sound for recording anything from music to interview. The IM2X can actually by useful for photographers and videographers as well as an inexpensive recording unit for interviews and other uses, either as a backup or when more expensive dedicated recorders are simply too expensive or big.
This B&H video preview shows some of the capabilities of the IM2X and include some real world demo recording with the unit. You can buy the Tascam IM2X on B&H for under $25.
The Tascam IM2X – inexpensive recorder for you iPad/iPhone