Interval App

Description

NOTE: You must buy this app from the APP STORE.
Put it in your cart for $0 and purchase it and you will get the link.
Or just click this link: https://apps.apple.com/ca/app/piano-tuners-slide-rule/id1645711444

Easily know all partials, coincident partials, and check notes. Just slide your finger on the screen. (App for Apple iPhone/iPad.)

$34.99 in the App Store.