I used a umik 1 mic and its a night and day difference from my phone mic... Don't forget skeptical!
About that...
So I've been suspicious these cheap measurement mics had some hidden trickery going on in order to be +/- .5dB (per the cal report) over much of the audible spectrum, as has been claimed in this thread.
This morning I downloaded & graphed the reports for my 2 cheap mics (iMM-6 & UMIK-1) and found they are far from flat so I was wrong to conjecture that their errors were corrected by DSP. They would make a very poor choice for any application where the correction file could not be employed.
Edit: swapped jpgs for the pdfs--for those who don't have a pdf viewer app