Wolfmancatsup
Empire State Human
There’s an app I used with my iPhone last year. Didn’t involve putting it on the platter - I had to print out a strobe disc and point the phone’s light at it. Can’t recall what it was now though, unfortunately. I’ll see if I can find out.
EDIT: Ah-ha!
http://crushapps.com/truenote/
Mick
EDIT: Ah-ha!
http://crushapps.com/truenote/
Mick