ShortScale.org

Anyone tried this software? For $149 it seems very clever, but:
1. you do need to have a laptop on stage with you, and
2. it seems like everyone using it is into tapping. At which I am crap.
http://www.jamorigin.com/products/

I messed around with a free version a while back, I wonder if it's got a bit steadier since (this is from 2018):