Collector for ArcGIS (iOS) v18.0.1 released on April 9th, 2018.
This Collector update introduces support for the Leica GG04 plus Smart Antenna. The GGO4 plus is the first high accuracy GNSS receiver from Leica Geosystems that you can pair with Collector on the iOS platform. Downloading the Zeno Connect app, to your iOS device, you can connect to a Realtime Correction source and collect data accurate to the centimeter.
In addition to supporting the GG04 plus, we recommend you update to the 18.0.1 release to pick up a security enhancement for hosted tile layers that will go live with the update to ArcGIS Online this week as well as a number of bug fixes and improvements including BUG-000091922, BUG-000092762, BUG-000093776, BUG-000095584, BUG-000109015, BUG-000109894.
Thank you for your ongoing support!