Love this app, but...

it DOESNT work in iOS 9.xx, and developers are dismissive of this FATAL error when the app starts. Full stop, this app is worthless (despite having paid for it) in iOS 9. Do not download if you have iOS 9 installed. It shows a loading screen and then jumps right back to the home screen. Read: no functionality.

Tonytenor about FourTrack, v7.0.1