Docs: Add note about Field Maps

Author: nseidle

docs/gis_software_android.md

@@ -4,7 +4,7 @@ Torch: ![Feature Supported](img/Icons/GreenDot.png) / EVK: ![Feature Supported](
 
 While we recommend [SW Maps for Android](https://docs.sparkfun.com/SparkFun_RTK_Everywhere_Firmware/gis_software_android/#sw-maps), there are a variety of 3rd party apps available for GIS and surveying for [Android](https://docs.sparkfun.com/SparkFun_RTK_Everywhere_Firmware/gis_software_android/), [iOS](https://docs.sparkfun.com/SparkFun_RTK_Everywhere_Firmware/gis_software_ios/), and [Windows](https://docs.sparkfun.com/SparkFun_RTK_Everywhere_Firmware/gis_software_windows/). We will cover a few examples below that should give you an idea of how to get the incoming NMEA data into the software of your choice.
 
-## AcrGIS Field Maps
+## ArcGIS Field Maps
 
 [ArcGIS Field Maps](https://play.google.com/store/apps/details?id=com.esri.fieldmaps&hl=en_US) by Esri is a popular GIS app. Unfortunately it does not have a built in NTRIP Client to allow high precision corrections down to the RTK device. To enable high-precision, a [mock location](connecting_bluetooth.md/#enable-mock-location) and an intermediary app such as [GNSS Master](gis_software_android.md/#gnss-master) or [Lefebure](gis_software_android.md/#lefebure) is needed.
 

docs/gis_software_ios.md

@@ -6,6 +6,14 @@ There are a variety of 3rd party apps available for GIS and surveying for [Andro
 
 The software options for Apple iOS are much more limited because Apple products do not support Bluetooth SPP. That's ok! The SparkFun RTK products support additional connection options including TCP and Bluetooth Low Energy (BLE).
 
+## ArcGIS Field Maps
+
+For reasons unknown, Esri removed TCP support from Field Maps for iOS and is therefore not usable by SparkFun RTK devices at this time. 
+
+If you must use iOS, checkout [SW Maps](gis_software_ios.md/#sw-maps), [ArcGIS QuickCapture](gis_software_ios.md/#arcgis-quickcapture), or [ArcGIS Survey123](gis_software_ios.md/#arcgis-survey123). 
+
+[Field Maps for Android](gis_software_android.md/#arcgis-field-maps) is supported.
+
 ## ArcGIS QuickCapture
 
 ![ArcGIS QuickCapture splash screen](<img/QuickCapture/SparkFun RTK QuickCapture - Main Window.png>)