I have both Starry Night Pro Plus 8 and SkySafari Pro 6 and thoroughly enjoy both. In the latter, however, there are two issues with Observing Sites. Firstly, the text fields giving Latitude, Longitude, Elevation, Time Zone, etc. do not display the text contained therein. Secondly, when selecting a site, either from the map, site location list or manual entry, nothing changes and one remains at the position determined by one's GPS location.
Observing Sites Text Fields Are Not Always Visible In Dark Mode