Is there a SDK for customizing or rolling our own Survey123 client, specifically for Android?
Hi. Yes, you can download the source code of the Survey123 for ArcGIS mobile application using AppStudio for ArcGIS Standard Edition. Using AppStudio for ArcGIS you can brand the mobile app, or add whatever modifications you see fit. Using AppStudio for ArcGIS you will be able to compile your projects to generate the binary files for execution in iOS, Android, Windows Phone, Windows, Ubunuty Linux and Mac.
Retrieving data ...