RØDE - VideoMic Me-C+

Sometimes it works to drop one of the mics in the audience and have the other one on your lapel - if they're too smart they'll filter out the audience noise, and as you pointed out you don't get to control volume individually doing it that way. You may be able to record video + audio with your phone, then separately with the Hollyland, if it saves the recording separately; mixing in post is a bit of a pain but people do it all the time. I actually find that a shotgun mic is good enough for most purposes. The modest improvement that the lav mic is offering me isn't worth the hassle. Rode has [this little guy](https://rode.com/en-us/products/videomic-me-c-plus) which might do exactly what you want. You can also just point the phone at yourself and see if the audio is good enough without doing anything fancy. It often is.

Rode video mic. But it’s consumer grade. A big step up from phone mic for close (2-4ft). Not “top quality” because that implies you’re using a proper preamp

In my experience, awful for anything with extremes (really quiet or really loud) and even “normal” conversation/dialog doesn’t sound GREAT. I would definitely recommend an external mic. For karaoke specifically, the Rode videomic should be OKAY, without diving off into more expensive and cumbersome equipment.

If you’re on a tight budget and plan to use an interface, there’s no point in opting for USB mics. or consider a Rode USB microphone and take advantage of the Rode Connect software.