Here's a list of microphones that will enhance your vocal recordings when using your smartphone.
The Movo PM10 Lavalier Clip-on Omnidirectional Condenser Microphone is designed for vocal or video use and provides clear and accurate voice reproduction. Newscaster-style design provides effective omni-directional pickup pattern. This is the best performance+cost value available for your complete video needs.
Buy it for $19.99
This microphone is specifically designed for smartphones & tablets but it is also compatible with digital recorders, laptops and other portable devices with a 3.5mm microphone jack. Setup of the Movo Photo MA100 Directional Microphone for iPhone, iPod Touch, iPad and Android Devices is simple - just plug & play for instant recording. Perfect for interviews, podcasts, dictation and more.
Microphone unit is small, super-portable, easy to adjust. Attractive silver finish. Solid construction resists bumps and minor shocks. Great sound and exceeds the quality of built-in microphones.
Buy it for $14.95
iRig MIC Cast The ultra-compact voice recording microphone for iPhone/iPod touch/iPad/ Android devices. iRig MIC Cast is the ultra-compact, portable voice recording microphone designed specifically for recording podcasts, interviews, lectures, voice memos, speeches and more.
Buy it here for $24.94
The all-new Mikey Digital is the perfect tool for mobile recording. Featuring two custom-tuned Blue capsules for stereo recording, a line-input, USB pass through and a stylish updated 230-degree rotating design, Mikey's three gain settings allow for a versatile recording experience for everything from a loud concert to a whisper. Record music, videos, interviews, guitars and more. Mikey also comes with its own soft carrying pouch for convenient storage and protection while on the go. Mikey turns your iPhone into the coolest mobile recording device around!
Buy it now for $40.36
Supports the iPhone 4S, iPhone 4, iPad, iPad 2, iPad (3rd generation), iPod touch (4th generation)
Stereo microphone which plug-in 30-pin dock connector
Records with CD quality (44.1kHz/16bit, depending on the iOS)
Buy it here for $39.99