My first time racing six cars. I need a new mic for my Ipad or phone

Hello friends,  I need a new mic I dont know what to get. I put together a race and was unsatisified with my voice audio.  I need my voice audio to be clear because I am part of a legally blind community;  my commentary is important to this community.  Check out the race here and help me choose a mic that will not hurt my pocket. Thanks so much!  youtu.be/Az4yq-pvpk8