I have created a a few web apps through ArcGIS Online and although I have shared each with "Everyone (public)", the URL I sent to a colleague brings up the ArcGIS Online sign in page. It seems as if the functionality of sharing apps has changed since the last time I visited our AGOL site. For instance, I no longer see the option to "embed" a map.
Here is an example of the url:
Here is the example from a test app created with AppBuilder:
Does anyone know why I cannot create a valid URL (that does not require a log in) from my shared ArcGIS Online web apps?