Apps, blogs, Apples, Androids. Balderdash. In my day we calculated prop slip with Part # 90-86147A1 (slide rule). Get the tech gurus down to the "secret room" and get them working on shaving the weight of a 400R or bulletproofing the Bravo instead of sitting around peeing on the wheels of progress.
But seriously, the app works now and I like it, a lot.
I agree, my phone has a calculator. :)
Pitch x rpm/1584(for a 1.5 ratio) for theoretical speed.
