The Edutige EIM-001 is a great all-around microphone for making videos with your iPhone or Android device.
But when should you use an external microphone that is directly plugged into your phone versus when to use a lavalier microphone? Check out the video for a demonstration to see what works best.
EIM-001 Omnidirectional microphone: https://www.edutige.net/shop/eim-001/
ESL-006 Extension cable: https://www.edutige.net/shop/esl-006/