Measuring turntable speed

Happy Holidays everyone!  This has probably been discussed before but I'm of the age that makes me a bit of a Luddite.  I have a VPI Scout and SDS.  I use "The Ultimate Analogue Test LP" to play the test tone and (at least I used to) the app Dr. Fridrekson(??) had other there.  It mysteriously disappeared from my iPad and I can't find it anywhere.  What are you using?  Thanks!