USB microphone setup to measure room for PC or Chromebook (non Apple user)

Hello, I thought I would ask the folks here that used modern USB mics and software to measure and improve their listening rooms what microphones and software they have used.

I'd like to do this to better understand my roonm response, and see where there may be bass nodes and so on so forth to try to improve.

There have been mentions of this being a good investment for not alot of money.  I hope people who have done this and have experience will share what equipment and software they use.  Cost effective stuff, please!

For example do I need a 'calibrated mic', or will an ordinary USB mic for gaming etc $25 off Amazon, do the trick?  And what software to see the frequency plot?  I am a PC user, or Chromebook.  Not an Apple guy, sorry.