Check for more info: http://www.smartlav.com/
Youtube info: RODE released their smartLav, a lavalier microphone that records into your smart phone, back in 2013. This is an incredibly convenient microphone that makes it simple to get decent quality audio for your videos. The build quality is great. But…the mic was noisy and produced a lot of hiss. Sort of spoiled things.
However, RODE has released an update to this mic: The smartLav+ that costs about $20 USD more but is worth every penny in my opinion, if you need the convenience of a mic that records into your smart phone.