The very affordable S100 RTK receiver is functionally similar to Alpha+ and Survey Antenna combined into one, with added WiFi to speed up transfer of PPK log files to the smartphone.
Being more integrated, we hope you'll find S100 an easy to use RTK rover !
Below 2.5 minutes tutorial video shows how easy it is setting up for RTK rover operation, and be on your way for RTK surveying. Mobile Topographer is used as an example for RTK surveying, other 3rd party Apps such as Mapit GIS, Explorer for ArcGIS, Collector for ArcGIS, FieldGenius for Android, Locus GIS, ...etc. could also be used.