We have recently updated Tracker for ArcGIS on the iTunes App Store to improve support for iOS 13 and changes to location permissions. Please read our official blog article on the ArcGIS Blog Site for more details.
I am the Group Product Engineering Lead for our Field Apps team at Esri. I work with an amazing team building out our field solutions.
Please feel free to ask me anything about ArcGIS Field Maps, Workforce, and Navigator.